Vulnerability-Lookup

BDU:2026-16201 (CVE-2026-20173)

Vulnerability from fstec – Published: 2026-10-12 – Updated: 2026-10-12 – View on bdu.fstec.ru Fixed

Title

Уязвимость операционной системы Cisco NX-OS, связанная с распределением ресурсов без ограничений и регулирования, позволяющая нарушителю вызвать отказ в обслуживании

Summary

Уязвимость операционной системы Cisco NX-OS связана с распределением ресурсов без ограничений и регулирования. Эксплуатация уязвимости может позволить нарушителю, действующему удаленно, вызвать отказ в обслуживании

Severity

5.0 (Medium) CVSS 2.0


                      
                        AV:N/AC:L/Au:N/C:N/I:N/A:P

5.8 (Medium) CVSS 3.1


                      
                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Class

Architecture vulnerability

Status

Confirmed by the vendor

Exploitation

Resource exhaustion

Incidents

Being clarified

Remediation

Software update

CWE

CWE-770 - Неограниченное распределение ресурсов или дросселирование

Aliases

CVE-2026-20173

References

1 reference

URL
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/c…

Impacted products

1 product from 2 vendors

Vendors

Cisco Systems, Inc.

Products

NX-OS

Versions

9.2(1) (NX-OS), 7.3(0)D1(1) (NX-OS), 7.3(0)DX(1) (NX-OS), 7.3(1)D1(1) (NX-OS), 7.3(2)D1(1) (NX-OS), 7.3(2)D1(2) (NX-OS), 7.3(2)D1(3) (NX-OS), 7.3(2)D1(3a) (NX-OS), 8.2(1) (NX-OS), 8.2(2) (NX-OS), 9.2 (NX-OS), 9.3 (NX-OS), 7.3(0)DX (NX-OS), 7.3(1)D1 (NX-OS), 7.3(2)D1 (NX-OS), 7.3(3)D1 (NX-OS), 7.3(4)D1 (NX-OS), 7.3(5)D1 (NX-OS), 8.4 (NX-OS), 7.3(6)D1 (NX-OS), 7.3(7)D1 (NX-OS), 7.3(8)D1 (NX-OS), 7.3(9)D1 (NX-OS), 7.3(0)D1 (NX-OS), 9.3(10) (NX-OS), 9.3(11) (NX-OS), 9.3(12) (NX-OS), 9.2(2) (NX-OS), 9.2(2t) (NX-OS), 9.2(2v) (NX-OS), 9.2(3) (NX-OS), 9.2(4) (NX-OS), 9.3(1) (NX-OS), 9.3(2) (NX-OS), 9.3(3) (NX-OS), 9.3(4) (NX-OS), 9.3(5) (NX-OS), 9.3(6) (NX-OS), 9.3(7) (NX-OS), 9.3(7a) (NX-OS), 9.3(8) (NX-OS), 9.3(9) (NX-OS), 10.3(1) (NX-OS), 10.3(2) (NX-OS), 10.3(3) (NX-OS), 10.3(99w) (NX-OS), 10.3(99x) (NX-OS), 10.4(1) (NX-OS), 8.1 (NX-OS), 8.2 (NX-OS), 8.3 (NX-OS), 10.3 (NX-OS), 7.3(2)D1(1d) (NX-OS), 8.1(1) (NX-OS), 8.1(2) (NX-OS), 8.1(2a) (NX-OS), 8.2(3) (NX-OS), 8.2(4) (NX-OS), 8.2(5) (NX-OS), 8.2(6) (NX-OS), 8.2(7) (NX-OS), 8.2(7a) (NX-OS), 8.2(8) (NX-OS), 8.2(9) (NX-OS), 8.2(10) (NX-OS), 8.2(11) (NX-OS), 8.3(1) (NX-OS), 8.3(2) (NX-OS), 9.2(3y) (NX-OS), 7.3(3)D1(1) (NX-OS), 7.3(4)D1(1) (NX-OS), 8.4(1) (NX-OS), 8.4(2) (NX-OS), 8.4(3) (NX-OS), 8.4(4) (NX-OS), 8.4(4a) (NX-OS), 8.4(5) (NX-OS), 8.4(6) (NX-OS), 8.4(6a) (NX-OS), 8.4(7) (NX-OS), 8.4(8) (NX-OS), 8.4(9) (NX-OS), 9.3(1z) (NX-OS), 9.3(5w) (NX-OS), 9.3(7k) (NX-OS), 9.3(13) (NX-OS), 7.3(5)D1(1) (NX-OS), 7.3(6)D1(1) (NX-OS), 7.3(7)D1(1) (NX-OS), 7.3(8)D1(1) (NX-OS), 7.3(9)D1(1) (NX-OS), 10.3(3w) (NX-OS), 10.3(3o) (NX-OS), 10.3(4a) (NX-OS), 10.3(3p) (NX-OS), 10.3(4) (NX-OS), 10.3(3q) (NX-OS), 10.3(3x) (NX-OS), 10.3(5) (NX-OS), 10.4(2) (NX-OS), 10.3(4g) (NX-OS), 10.3(3r) (NX-OS), 10.4(3) (NX-OS), 9.3(14) (NX-OS), 10.3(6) (NX-OS), 10.3(4h) (NX-OS), 10.4(4) (NX-OS), 10.5(1) (NX-OS), 10.4(4g) (NX-OS), 10.5(2) (NX-OS), 9.3(15) (NX-OS), 10.3(7) (NX-OS), 10.4(5) (NX-OS), 10.5(3) (NX-OS), 10.5(3t) (NX-OS), 10.5(3e) (NX-OS), 10.5(3o) (NX-OS), 10.5(3s) (NX-OS), 9.3(16) (NX-OS), 9.3(17) (NX-OS), 10.3(8) (NX-OS), 10.4 (NX-OS), 10.4(6) (NX-OS), 10.4(7) (NX-OS), 10.5 (NX-OS), 10.5(4) (NX-OS), 10.5(3p) (NX-OS), 10.5(5) (NX-OS), 8.4(10) (NX-OS), 8.4(11) (NX-OS), 8.4(12) (NX-OS)

Product types

Operating system

Platforms

Cisco Systems, Inc. NX-OS 9.2(1), Inc. NX-OS 7.3(0)D1(1), Inc. NX-OS 7.3(0)DX(1), Inc. NX-OS 7.3(1)D1(1), Inc. NX-OS 7.3(2)D1(1), Inc. NX-OS 7.3(2)D1(2), Inc. NX-OS 7.3(2)D1(3), Inc. NX-OS 7.3(2)D1(3a), Inc. NX-OS 8.2(1), Inc. NX-OS 8.2(2), Inc. NX-OS 9.2, Inc. NX-OS 9.3, Inc. NX-OS 7.3(0)DX, Inc. NX-OS 7.3(1)D1, Inc. NX-OS 7.3(2)D1, Inc. NX-OS 7.3(3)D1, Inc. NX-OS 7.3(4)D1, Inc. NX-OS 7.3(5)D1, Inc. NX-OS 8.4, Inc. NX-OS 7.3(6)D1, Inc. NX-OS 7.3(7)D1, Inc. NX-OS 7.3(8)D1, Inc. NX-OS 7.3(9)D1, Inc. NX-OS 7.3(0)D1, Inc. NX-OS 9.3(10), Inc. NX-OS 9.3(11), Inc. NX-OS 9.3(12), Inc. NX-OS 9.2(2), Inc. NX-OS 9.2(2t), Inc. NX-OS 9.2(2v), Inc. NX-OS 9.2(3), Inc. NX-OS 9.2(4), Inc. NX-OS 9.3(1), Inc. NX-OS 9.3(2), Inc. NX-OS 9.3(3), Inc. NX-OS 9.3(4), Inc. NX-OS 9.3(5), Inc. NX-OS 9.3(6), Inc. NX-OS 9.3(7), Inc. NX-OS 9.3(7a), Inc. NX-OS 9.3(8), Inc. NX-OS 9.3(9), Inc. NX-OS 10.3(1), Inc. NX-OS 10.3(2), Inc. NX-OS 10.3(3), Inc. NX-OS 10.3(99w), Inc. NX-OS 10.3(99x), Inc. NX-OS 10.4(1), Inc. NX-OS 8.1, Inc. NX-OS 8.2, Inc. NX-OS 8.3, Inc. NX-OS 10.3, Inc. NX-OS 7.3(2)D1(1d), Inc. NX-OS 8.1(1), Inc. NX-OS 8.1(2), Inc. NX-OS 8.1(2a), Inc. NX-OS 8.2(3), Inc. NX-OS 8.2(4), Inc. NX-OS 8.2(5), Inc. NX-OS 8.2(6), Inc. NX-OS 8.2(7), Inc. NX-OS 8.2(7a), Inc. NX-OS 8.2(8), Inc. NX-OS 8.2(9), Inc. NX-OS 8.2(10), Inc. NX-OS 8.2(11), Inc. NX-OS 8.3(1), Inc. NX-OS 8.3(2), Inc. NX-OS 9.2(3y), Inc. NX-OS 7.3(3)D1(1), Inc. NX-OS 7.3(4)D1(1), Inc. NX-OS 8.4(1), Inc. NX-OS 8.4(2), Inc. NX-OS 8.4(3), Inc. NX-OS 8.4(4), Inc. NX-OS 8.4(4a), Inc. NX-OS 8.4(5), Inc. NX-OS 8.4(6), Inc. NX-OS 8.4(6a), Inc. NX-OS 8.4(7), Inc. NX-OS 8.4(8), Inc. NX-OS 8.4(9), Inc. NX-OS 9.3(1z), Inc. NX-OS 9.3(5w), Inc. NX-OS 9.3(7k), Inc. NX-OS 9.3(13), Inc. NX-OS 7.3(5)D1(1), Inc. NX-OS 7.3(6)D1(1), Inc. NX-OS 7.3(7)D1(1), Inc. NX-OS 7.3(8)D1(1), Inc. NX-OS 7.3(9)D1(1), Inc. NX-OS 10.3(3w), Inc. NX-OS 10.3(3o), Inc. NX-OS 10.3(4a), Inc. NX-OS 10.3(3p), Inc. NX-OS 10.3(4), Inc. NX-OS 10.3(3q), Inc. NX-OS 10.3(3x), Inc. NX-OS 10.3(5), Inc. NX-OS 10.4(2), Inc. NX-OS 10.3(4g), Inc. NX-OS 10.3(3r), Inc. NX-OS 10.4(3), Inc. NX-OS 9.3(14), Inc. NX-OS 10.3(6), Inc. NX-OS 10.3(4h), Inc. NX-OS 10.4(4), Inc. NX-OS 10.5(1), Inc. NX-OS 10.4(4g), Inc. NX-OS 10.5(2), Inc. NX-OS 9.3(15), Inc. NX-OS 10.3(7), Inc. NX-OS 10.4(5), Inc. NX-OS 10.5(3), Inc. NX-OS 10.5(3t), Inc. NX-OS 10.5(3e), Inc. NX-OS 10.5(3o), Inc. NX-OS 10.5(3s), Inc. NX-OS 9.3(16), Inc. NX-OS 9.3(17), Inc. NX-OS 10.3(8), Inc. NX-OS 10.4, Inc. NX-OS 10.4(6), Inc. NX-OS 10.4(7), Inc. NX-OS 10.5, Inc. NX-OS 10.5(4), Inc. NX-OS 10.5(3p), Inc. NX-OS 10.5(5), Inc. NX-OS 8.4(10), Inc. NX-OS 8.4(11), Inc. NX-OS 8.4(12)

Mitigations

Использование рекомендаций: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-nscpdos-SnderkC7

JSON

To clipboard

{
  "CVSS 2.0": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
  "CVSS 3.0": "AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "Cisco Systems, Inc.",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "9.2(1) (NX-OS), 7.3(0)D1(1) (NX-OS), 7.3(0)DX(1) (NX-OS), 7.3(1)D1(1) (NX-OS), 7.3(2)D1(1) (NX-OS), 7.3(2)D1(2) (NX-OS), 7.3(2)D1(3) (NX-OS), 7.3(2)D1(3a) (NX-OS), 8.2(1) (NX-OS), 8.2(2) (NX-OS), 9.2 (NX-OS), 9.3 (NX-OS), 7.3(0)DX (NX-OS), 7.3(1)D1 (NX-OS), 7.3(2)D1 (NX-OS), 7.3(3)D1 (NX-OS), 7.3(4)D1 (NX-OS), 7.3(5)D1 (NX-OS), 8.4 (NX-OS), 7.3(6)D1 (NX-OS), 7.3(7)D1 (NX-OS), 7.3(8)D1 (NX-OS), 7.3(9)D1 (NX-OS), 7.3(0)D1 (NX-OS), 9.3(10) (NX-OS), 9.3(11) (NX-OS), 9.3(12) (NX-OS), 9.2(2) (NX-OS), 9.2(2t) (NX-OS), 9.2(2v) (NX-OS), 9.2(3) (NX-OS), 9.2(4) (NX-OS), 9.3(1) (NX-OS), 9.3(2) (NX-OS), 9.3(3) (NX-OS), 9.3(4) (NX-OS), 9.3(5) (NX-OS), 9.3(6) (NX-OS), 9.3(7) (NX-OS), 9.3(7a) (NX-OS), 9.3(8) (NX-OS), 9.3(9) (NX-OS), 10.3(1) (NX-OS), 10.3(2) (NX-OS), 10.3(3) (NX-OS), 10.3(99w) (NX-OS), 10.3(99x) (NX-OS), 10.4(1) (NX-OS), 8.1 (NX-OS), 8.2 (NX-OS), 8.3 (NX-OS), 10.3 (NX-OS), 7.3(2)D1(1d) (NX-OS), 8.1(1) (NX-OS), 8.1(2) (NX-OS), 8.1(2a) (NX-OS), 8.2(3) (NX-OS), 8.2(4) (NX-OS), 8.2(5) (NX-OS), 8.2(6) (NX-OS), 8.2(7) (NX-OS), 8.2(7a) (NX-OS), 8.2(8) (NX-OS), 8.2(9) (NX-OS), 8.2(10) (NX-OS), 8.2(11) (NX-OS), 8.3(1) (NX-OS), 8.3(2) (NX-OS), 9.2(3y) (NX-OS), 7.3(3)D1(1) (NX-OS), 7.3(4)D1(1) (NX-OS), 8.4(1) (NX-OS), 8.4(2) (NX-OS), 8.4(3) (NX-OS), 8.4(4) (NX-OS), 8.4(4a) (NX-OS), 8.4(5) (NX-OS), 8.4(6) (NX-OS), 8.4(6a) (NX-OS), 8.4(7) (NX-OS), 8.4(8) (NX-OS), 8.4(9) (NX-OS), 9.3(1z) (NX-OS), 9.3(5w) (NX-OS), 9.3(7k) (NX-OS), 9.3(13) (NX-OS), 7.3(5)D1(1) (NX-OS), 7.3(6)D1(1) (NX-OS), 7.3(7)D1(1) (NX-OS), 7.3(8)D1(1) (NX-OS), 7.3(9)D1(1) (NX-OS), 10.3(3w) (NX-OS), 10.3(3o) (NX-OS), 10.3(4a) (NX-OS), 10.3(3p) (NX-OS), 10.3(4) (NX-OS), 10.3(3q) (NX-OS), 10.3(3x) (NX-OS), 10.3(5) (NX-OS), 10.4(2) (NX-OS), 10.3(4g) (NX-OS), 10.3(3r) (NX-OS), 10.4(3) (NX-OS), 9.3(14) (NX-OS), 10.3(6) (NX-OS), 10.3(4h) (NX-OS), 10.4(4) (NX-OS), 10.5(1) (NX-OS), 10.4(4g) (NX-OS), 10.5(2) (NX-OS), 9.3(15) (NX-OS), 10.3(7) (NX-OS), 10.4(5) (NX-OS), 10.5(3) (NX-OS), 10.5(3t) (NX-OS), 10.5(3e) (NX-OS), 10.5(3o) (NX-OS), 10.5(3s) (NX-OS), 9.3(16) (NX-OS), 9.3(17) (NX-OS), 10.3(8) (NX-OS), 10.4 (NX-OS), 10.4(6) (NX-OS), 10.4(7) (NX-OS), 10.5 (NX-OS), 10.5(4) (NX-OS), 10.5(3p) (NX-OS), 10.5(5) (NX-OS), 8.4(10) (NX-OS), 8.4(11) (NX-OS), 8.4(12) (NX-OS)",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439:\nhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-nscpdos-SnderkC7",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "07.10.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "12.10.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "12.10.2026",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2026-16201",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2026-20173",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "NX-OS",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": "Cisco Systems, Inc. NX-OS 9.2(1) , Cisco Systems, Inc. NX-OS 7.3(0)D1(1) , Cisco Systems, Inc. NX-OS 7.3(0)DX(1) , Cisco Systems, Inc. NX-OS 7.3(1)D1(1) , Cisco Systems, Inc. NX-OS 7.3(2)D1(1) , Cisco Systems, Inc. NX-OS 7.3(2)D1(2) , Cisco Systems, Inc. NX-OS 7.3(2)D1(3) , Cisco Systems, Inc. NX-OS 7.3(2)D1(3a) , Cisco Systems, Inc. NX-OS 8.2(1) , Cisco Systems, Inc. NX-OS 8.2(2) , Cisco Systems, Inc. NX-OS 9.2 , Cisco Systems, Inc. NX-OS 9.3 , Cisco Systems, Inc. NX-OS 7.3(0)DX , Cisco Systems, Inc. NX-OS 7.3(1)D1 , Cisco Systems, Inc. NX-OS 7.3(2)D1 , Cisco Systems, Inc. NX-OS 7.3(3)D1 , Cisco Systems, Inc. NX-OS 7.3(4)D1 , Cisco Systems, Inc. NX-OS 7.3(5)D1 , Cisco Systems, Inc. NX-OS 8.4 , Cisco Systems, Inc. NX-OS 7.3(6)D1 , Cisco Systems, Inc. NX-OS 7.3(7)D1 , Cisco Systems, Inc. NX-OS 7.3(8)D1 , Cisco Systems, Inc. NX-OS 7.3(9)D1 , Cisco Systems, Inc. NX-OS 7.3(0)D1 , Cisco Systems, Inc. NX-OS 9.3(10) , Cisco Systems, Inc. NX-OS 9.3(11) , Cisco Systems, Inc. NX-OS 9.3(12) , Cisco Systems, Inc. NX-OS 9.2(2) , Cisco Systems, Inc. NX-OS 9.2(2t) , Cisco Systems, Inc. NX-OS 9.2(2v) , Cisco Systems, Inc. NX-OS 9.2(3) , Cisco Systems, Inc. NX-OS 9.2(4) , Cisco Systems, Inc. NX-OS 9.3(1) , Cisco Systems, Inc. NX-OS 9.3(2) , Cisco Systems, Inc. NX-OS 9.3(3) , Cisco Systems, Inc. NX-OS 9.3(4) , Cisco Systems, Inc. NX-OS 9.3(5) , Cisco Systems, Inc. NX-OS 9.3(6) , Cisco Systems, Inc. NX-OS 9.3(7) , Cisco Systems, Inc. NX-OS 9.3(7a) , Cisco Systems, Inc. NX-OS 9.3(8) , Cisco Systems, Inc. NX-OS 9.3(9) , Cisco Systems, Inc. NX-OS 10.3(1) , Cisco Systems, Inc. NX-OS 10.3(2) , Cisco Systems, Inc. NX-OS 10.3(3) , Cisco Systems, Inc. NX-OS 10.3(99w) , Cisco Systems, Inc. NX-OS 10.3(99x) , Cisco Systems, Inc. NX-OS 10.4(1) , Cisco Systems, Inc. NX-OS 8.1 , Cisco Systems, Inc. NX-OS 8.2 , Cisco Systems, Inc. NX-OS 8.3 , Cisco Systems, Inc. NX-OS 10.3 , Cisco Systems, Inc. NX-OS 7.3(2)D1(1d) , Cisco Systems, Inc. NX-OS 8.1(1) , Cisco Systems, Inc. NX-OS 8.1(2) , Cisco Systems, Inc. NX-OS 8.1(2a) , Cisco Systems, Inc. NX-OS 8.2(3) , Cisco Systems, Inc. NX-OS 8.2(4) , Cisco Systems, Inc. NX-OS 8.2(5) , Cisco Systems, Inc. NX-OS 8.2(6) , Cisco Systems, Inc. NX-OS 8.2(7) , Cisco Systems, Inc. NX-OS 8.2(7a) , Cisco Systems, Inc. NX-OS 8.2(8) , Cisco Systems, Inc. NX-OS 8.2(9) , Cisco Systems, Inc. NX-OS 8.2(10) , Cisco Systems, Inc. NX-OS 8.2(11) , Cisco Systems, Inc. NX-OS 8.3(1) , Cisco Systems, Inc. NX-OS 8.3(2) , Cisco Systems, Inc. NX-OS 9.2(3y) , Cisco Systems, Inc. NX-OS 7.3(3)D1(1) , Cisco Systems, Inc. NX-OS 7.3(4)D1(1) , Cisco Systems, Inc. NX-OS 8.4(1) , Cisco Systems, Inc. NX-OS 8.4(2) , Cisco Systems, Inc. NX-OS 8.4(3) , Cisco Systems, Inc. NX-OS 8.4(4) , Cisco Systems, Inc. NX-OS 8.4(4a) , Cisco Systems, Inc. NX-OS 8.4(5) , Cisco Systems, Inc. NX-OS 8.4(6) , Cisco Systems, Inc. NX-OS 8.4(6a) , Cisco Systems, Inc. NX-OS 8.4(7) , Cisco Systems, Inc. NX-OS 8.4(8) , Cisco Systems, Inc. NX-OS 8.4(9) , Cisco Systems, Inc. NX-OS 9.3(1z) , Cisco Systems, Inc. NX-OS 9.3(5w) , Cisco Systems, Inc. NX-OS 9.3(7k) , Cisco Systems, Inc. NX-OS 9.3(13) , Cisco Systems, Inc. NX-OS 7.3(5)D1(1) , Cisco Systems, Inc. NX-OS 7.3(6)D1(1) , Cisco Systems, Inc. NX-OS 7.3(7)D1(1) , Cisco Systems, Inc. NX-OS 7.3(8)D1(1) , Cisco Systems, Inc. NX-OS 7.3(9)D1(1) , Cisco Systems, Inc. NX-OS 10.3(3w) , Cisco Systems, Inc. NX-OS 10.3(3o) , Cisco Systems, Inc. NX-OS 10.3(4a) , Cisco Systems, Inc. NX-OS 10.3(3p) , Cisco Systems, Inc. NX-OS 10.3(4) , Cisco Systems, Inc. NX-OS 10.3(3q) , Cisco Systems, Inc. NX-OS 10.3(3x) , Cisco Systems, Inc. NX-OS 10.3(5) , Cisco Systems, Inc. NX-OS 10.4(2) , Cisco Systems, Inc. NX-OS 10.3(4g) , Cisco Systems, Inc. NX-OS 10.3(3r) , Cisco Systems, Inc. NX-OS 10.4(3) , Cisco Systems, Inc. NX-OS 9.3(14) , Cisco Systems, Inc. NX-OS 10.3(6) , Cisco Systems, Inc. NX-OS 10.3(4h) , Cisco Systems, Inc. NX-OS 10.4(4) , Cisco Systems, Inc. NX-OS 10.5(1) , Cisco Systems, Inc. NX-OS 10.4(4g) , Cisco Systems, Inc. NX-OS 10.5(2) , Cisco Systems, Inc. NX-OS 9.3(15) , Cisco Systems, Inc. NX-OS 10.3(7) , Cisco Systems, Inc. NX-OS 10.4(5) , Cisco Systems, Inc. NX-OS 10.5(3) , Cisco Systems, Inc. NX-OS 10.5(3t) , Cisco Systems, Inc. NX-OS 10.5(3e) , Cisco Systems, Inc. NX-OS 10.5(3o) , Cisco Systems, Inc. NX-OS 10.5(3s) , Cisco Systems, Inc. NX-OS 9.3(16) , Cisco Systems, Inc. NX-OS 9.3(17) , Cisco Systems, Inc. NX-OS 10.3(8) , Cisco Systems, Inc. NX-OS 10.4 , Cisco Systems, Inc. NX-OS 10.4(6) , Cisco Systems, Inc. NX-OS 10.4(7) , Cisco Systems, Inc. NX-OS 10.5 , Cisco Systems, Inc. NX-OS 10.5(4) , Cisco Systems, Inc. NX-OS 10.5(3p) , Cisco Systems, Inc. NX-OS 10.5(5) , Cisco Systems, Inc. NX-OS 8.4(10) , Cisco Systems, Inc. NX-OS 8.4(11) , Cisco Systems, Inc. NX-OS 8.4(12) ",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Cisco NX-OS, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u0430\u044f \u0441 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0435\u043c \u0440\u0435\u0441\u0443\u0440\u0441\u043e\u0432 \u0431\u0435\u0437 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u0439 \u0438 \u0440\u0435\u0433\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u041d\u0435\u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u043e\u0435 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0435 \u0440\u0435\u0441\u0443\u0440\u0441\u043e\u0432 \u0438\u043b\u0438 \u0434\u0440\u043e\u0441\u0441\u0435\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 (CWE-770)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Cisco NX-OS \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0435\u043c \u0440\u0435\u0441\u0443\u0440\u0441\u043e\u0432 \u0431\u0435\u0437 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u0439 \u0438 \u0440\u0435\u0433\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e, \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u043c\u0443 \u0443\u0434\u0430\u043b\u0435\u043d\u043d\u043e, \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u0418\u0441\u0447\u0435\u0440\u043f\u0430\u043d\u0438\u0435 \u0440\u0435\u0441\u0443\u0440\u0441\u043e\u0432",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-nscpdos-SnderkC7",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u0430\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u0430",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-770",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 5)\n\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.1 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 5,8)"
}

CVE-2026-20173 (GCVE-0-2026-20173)

Vulnerability from cvelistv5 – Published: 2026-10-07 16:12 – Updated: 2026-10-07 17:42

Title

Cisco NX-OS Software Denial of Service Vulnerability

Summary

A vulnerability in Cisco NX-OS Software could allow an unauthenticated, remote attacker to exhaust system resources, causing a denial of service (DoS) condition. This vulnerability exists because rate limiting was improperly applied to some protocols. An attacker could exploit this vulnerability by sending a high rate of UDP or TCP connections to a data plane interface on an affected device. A successful exploit could allow the attacker to cause instability to various routing and control plane protocols through some packet loss and temporary disruptions, causing a DoS condition. This DoS condition will clear without manual intervention soon after the high rate of traffic is stopped.

Severity

5.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-07 17:42 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

cisco mitre root Scorecard

References

1 reference

URL	Tags
https://sec.cloudapps.cisco.com/security/center/c…

Impacted products

1 product

Vendor	Product	Version
Cisco	Cisco NX-OS Software	Affected: 8.2(5) Affected: 7.3(5)D1(1) Affected: 8.4(2) Affected: 8.4(3) Affected: 9.2(3) Affected: 9.2(2v) Affected: 7.3(4)D1(1) Affected: 8.2(1) Affected: 9.2(1) Affected: 9.2(2t) Affected: 9.2(3y) Affected: 9.3(2) Affected: 8.1(1) Affected: 8.2(2) Affected: 8.3(2) Affected: 7.3(2)D1(3a) Affected: 9.2(4) Affected: 8.1(2) Affected: 7.3(3)D1(1) Affected: 8.2(3) Affected: 8.4(1) Affected: 7.3(0)DX(1) Affected: 7.3(2)D1(1) Affected: 9.3(1) Affected: 7.3(2)D1(2) Affected: 8.2(4) Affected: 9.3(1z) Affected: 9.2(2) Affected: 8.1(2a) Affected: 7.3(2)D1(3) Affected: 8.3(1) Affected: 7.3(1)D1(1) Affected: 7.3(0)D1(1) Affected: 9.3(3) Affected: 7.3(2)D1(1d) Affected: 9.3(4) Affected: 7.3(6)D1(1) Affected: 8.2(6) Affected: 9.3(5) Affected: 9.3(6) Affected: 8.4(4) Affected: 7.3(7)D1(1) Affected: 9.3(5w) Affected: 8.2(7) Affected: 9.3(7) Affected: 9.3(7k) Affected: 7.3(8)D1(1) Affected: 9.3(7a) Affected: 8.2(7a) Affected: 9.3(8) Affected: 8.4(4a) Affected: 8.4(5) Affected: 8.2(8) Affected: 9.3(9) Affected: 7.3(9)D1(1) Affected: 8.4(6) Affected: 9.3(10) Affected: 8.2(9) Affected: 10.3(1) Affected: 8.4(7) Affected: 10.3(2) Affected: 8.4(6a) Affected: 9.3(11) Affected: 10.3(3) Affected: 8.2(10) Affected: 9.3(12) Affected: 10.4(1) Affected: 8.4(8) Affected: 10.3(99w) Affected: 10.3(3w) Affected: 10.3(99x) Affected: 10.3(3o) Affected: 8.4(9) Affected: 10.3(4) Affected: 10.3(3p) Affected: 10.3(4a) Affected: 10.4(2) Affected: 10.3(3q) Affected: 9.3(13) Affected: 8.2(11) Affected: 10.3(5) Affected: 10.4(3) Affected: 10.3(3x) Affected: 10.3(4g) Affected: 10.5(1) Affected: 8.4(10) Affected: 10.3(3r) Affected: 10.3(6) Affected: 9.3(14) Affected: 10.4(4) Affected: 10.3(4h) Affected: 10.5(2) Affected: 8.4(11) Affected: 10.3(7) Affected: 10.4(5) Affected: 10.5(3) Affected: 9.3(15) Affected: 10.4(4g) Affected: 10.5(4) Affected: 8.4(12) Affected: 10.5(3t) Affected: 10.3(8) Affected: 10.4(6) Affected: 10.5(3s) Affected: 10.5(3e) Affected: 10.5(3o) Affected: 9.3(16) Affected: 10.5(3p) Affected: 10.4(7) Affected: 10.5(5) Affected: 9.3(17)

Show details on NVD website

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-20173",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-07T17:42:18.044011Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-07T17:42:39.672Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Cisco NX-OS Software",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "8.2(5)"
            },
            {
              "status": "affected",
              "version": "7.3(5)D1(1)"
            },
            {
              "status": "affected",
              "version": "8.4(2)"
            },
            {
              "status": "affected",
              "version": "8.4(3)"
            },
            {
              "status": "affected",
              "version": "9.2(3)"
            },
            {
              "status": "affected",
              "version": "9.2(2v)"
            },
            {
              "status": "affected",
              "version": "7.3(4)D1(1)"
            },
            {
              "status": "affected",
              "version": "8.2(1)"
            },
            {
              "status": "affected",
              "version": "9.2(1)"
            },
            {
              "status": "affected",
              "version": "9.2(2t)"
            },
            {
              "status": "affected",
              "version": "9.2(3y)"
            },
            {
              "status": "affected",
              "version": "9.3(2)"
            },
            {
              "status": "affected",
              "version": "8.1(1)"
            },
            {
              "status": "affected",
              "version": "8.2(2)"
            },
            {
              "status": "affected",
              "version": "8.3(2)"
            },
            {
              "status": "affected",
              "version": "7.3(2)D1(3a)"
            },
            {
              "status": "affected",
              "version": "9.2(4)"
            },
            {
              "status": "affected",
              "version": "8.1(2)"
            },
            {
              "status": "affected",
              "version": "7.3(3)D1(1)"
            },
            {
              "status": "affected",
              "version": "8.2(3)"
            },
            {
              "status": "affected",
              "version": "8.4(1)"
            },
            {
              "status": "affected",
              "version": "7.3(0)DX(1)"
            },
            {
              "status": "affected",
              "version": "7.3(2)D1(1)"
            },
            {
              "status": "affected",
              "version": "9.3(1)"
            },
            {
              "status": "affected",
              "version": "7.3(2)D1(2)"
            },
            {
              "status": "affected",
              "version": "8.2(4)"
            },
            {
              "status": "affected",
              "version": "9.3(1z)"
            },
            {
              "status": "affected",
              "version": "9.2(2)"
            },
            {
              "status": "affected",
              "version": "8.1(2a)"
            },
            {
              "status": "affected",
              "version": "7.3(2)D1(3)"
            },
            {
              "status": "affected",
              "version": "8.3(1)"
            },
            {
              "status": "affected",
              "version": "7.3(1)D1(1)"
            },
            {
              "status": "affected",
              "version": "7.3(0)D1(1)"
            },
            {
              "status": "affected",
              "version": "9.3(3)"
            },
            {
              "status": "affected",
              "version": "7.3(2)D1(1d)"
            },
            {
              "status": "affected",
              "version": "9.3(4)"
            },
            {
              "status": "affected",
              "version": "7.3(6)D1(1)"
            },
            {
              "status": "affected",
              "version": "8.2(6)"
            },
            {
              "status": "affected",
              "version": "9.3(5)"
            },
            {
              "status": "affected",
              "version": "9.3(6)"
            },
            {
              "status": "affected",
              "version": "8.4(4)"
            },
            {
              "status": "affected",
              "version": "7.3(7)D1(1)"
            },
            {
              "status": "affected",
              "version": "9.3(5w)"
            },
            {
              "status": "affected",
              "version": "8.2(7)"
            },
            {
              "status": "affected",
              "version": "9.3(7)"
            },
            {
              "status": "affected",
              "version": "9.3(7k)"
            },
            {
              "status": "affected",
              "version": "7.3(8)D1(1)"
            },
            {
              "status": "affected",
              "version": "9.3(7a)"
            },
            {
              "status": "affected",
              "version": "8.2(7a)"
            },
            {
              "status": "affected",
              "version": "9.3(8)"
            },
            {
              "status": "affected",
              "version": "8.4(4a)"
            },
            {
              "status": "affected",
              "version": "8.4(5)"
            },
            {
              "status": "affected",
              "version": "8.2(8)"
            },
            {
              "status": "affected",
              "version": "9.3(9)"
            },
            {
              "status": "affected",
              "version": "7.3(9)D1(1)"
            },
            {
              "status": "affected",
              "version": "8.4(6)"
            },
            {
              "status": "affected",
              "version": "9.3(10)"
            },
            {
              "status": "affected",
              "version": "8.2(9)"
            },
            {
              "status": "affected",
              "version": "10.3(1)"
            },
            {
              "status": "affected",
              "version": "8.4(7)"
            },
            {
              "status": "affected",
              "version": "10.3(2)"
            },
            {
              "status": "affected",
              "version": "8.4(6a)"
            },
            {
              "status": "affected",
              "version": "9.3(11)"
            },
            {
              "status": "affected",
              "version": "10.3(3)"
            },
            {
              "status": "affected",
              "version": "8.2(10)"
            },
            {
              "status": "affected",
              "version": "9.3(12)"
            },
            {
              "status": "affected",
              "version": "10.4(1)"
            },
            {
              "status": "affected",
              "version": "8.4(8)"
            },
            {
              "status": "affected",
              "version": "10.3(99w)"
            },
            {
              "status": "affected",
              "version": "10.3(3w)"
            },
            {
              "status": "affected",
              "version": "10.3(99x)"
            },
            {
              "status": "affected",
              "version": "10.3(3o)"
            },
            {
              "status": "affected",
              "version": "8.4(9)"
            },
            {
              "status": "affected",
              "version": "10.3(4)"
            },
            {
              "status": "affected",
              "version": "10.3(3p)"
            },
            {
              "status": "affected",
              "version": "10.3(4a)"
            },
            {
              "status": "affected",
              "version": "10.4(2)"
            },
            {
              "status": "affected",
              "version": "10.3(3q)"
            },
            {
              "status": "affected",
              "version": "9.3(13)"
            },
            {
              "status": "affected",
              "version": "8.2(11)"
            },
            {
              "status": "affected",
              "version": "10.3(5)"
            },
            {
              "status": "affected",
              "version": "10.4(3)"
            },
            {
              "status": "affected",
              "version": "10.3(3x)"
            },
            {
              "status": "affected",
              "version": "10.3(4g)"
            },
            {
              "status": "affected",
              "version": "10.5(1)"
            },
            {
              "status": "affected",
              "version": "8.4(10)"
            },
            {
              "status": "affected",
              "version": "10.3(3r)"
            },
            {
              "status": "affected",
              "version": "10.3(6)"
            },
            {
              "status": "affected",
              "version": "9.3(14)"
            },
            {
              "status": "affected",
              "version": "10.4(4)"
            },
            {
              "status": "affected",
              "version": "10.3(4h)"
            },
            {
              "status": "affected",
              "version": "10.5(2)"
            },
            {
              "status": "affected",
              "version": "8.4(11)"
            },
            {
              "status": "affected",
              "version": "10.3(7)"
            },
            {
              "status": "affected",
              "version": "10.4(5)"
            },
            {
              "status": "affected",
              "version": "10.5(3)"
            },
            {
              "status": "affected",
              "version": "9.3(15)"
            },
            {
              "status": "affected",
              "version": "10.4(4g)"
            },
            {
              "status": "affected",
              "version": "10.5(4)"
            },
            {
              "status": "affected",
              "version": "8.4(12)"
            },
            {
              "status": "affected",
              "version": "10.5(3t)"
            },
            {
              "status": "affected",
              "version": "10.3(8)"
            },
            {
              "status": "affected",
              "version": "10.4(6)"
            },
            {
              "status": "affected",
              "version": "10.5(3s)"
            },
            {
              "status": "affected",
              "version": "10.5(3e)"
            },
            {
              "status": "affected",
              "version": "10.5(3o)"
            },
            {
              "status": "affected",
              "version": "9.3(16)"
            },
            {
              "status": "affected",
              "version": "10.5(3p)"
            },
            {
              "status": "affected",
              "version": "10.4(7)"
            },
            {
              "status": "affected",
              "version": "10.5(5)"
            },
            {
              "status": "affected",
              "version": "9.3(17)"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in Cisco NX-OS Software could allow an unauthenticated, remote attacker to exhaust system resources, causing a denial of service (DoS) condition.\r\n\r\nThis vulnerability exists because rate limiting was improperly applied to some protocols. An attacker could exploit this vulnerability by sending a high rate of UDP or TCP connections to a data plane interface on an affected device. A successful exploit could allow the attacker to cause instability to various routing and control plane protocols through some packet loss and temporary disruptions, causing a DoS condition. This DoS condition will clear without manual intervention soon after the high rate of traffic is stopped."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L",
            "version": "3.1"
          },
          "format": "cvssV3_1"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "cwe"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-07T16:12:04.505Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "cisco-sa-nxos-nscpdos-SnderkC7",
          "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-nscpdos-SnderkC7"
        }
      ],
      "source": {
        "advisory": "cisco-sa-nxos-nscpdos-SnderkC7",
        "defects": [
          "CSCws28832"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Cisco NX-OS Software Denial of Service Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2026-20173",
    "datePublished": "2026-10-07T16:12:04.505Z",
    "dateReserved": "2025-10-08T11:59:15.392Z",
    "dateUpdated": "2026-10-07T17:42:39.672Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

BDU:2026-16201 (CVE-2026-20173)

CVE-2026-20173 (GCVE-0-2026-20173)

Tags

Sightings

Nomenclature

Related by attack behaviour