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EUVD-2026-224405

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 06:51

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T06:51:40.202782+00:00",
  "id": "EUVD-2026-224405"
}

CVE-2025-20115 (GCVE-0-2025-20115)

Vulnerability from cvelistv5 – Published: 2025-03-12 16:11 – Updated: 2025-03-21 20:35

Title

Cisco IOS XR Software Border Gateway Protocol Denial of Service Vulnerability

Summary

A vulnerability in confederation implementation for the Border Gateway Protocol (BGP) in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to a memory corruption that occurs when a BGP update is created with an AS_CONFED_SEQUENCE attribute that has 255 autonomous system numbers (AS numbers). An attacker could exploit this vulnerability by sending a crafted BGP update message, or the network could be designed in such a manner that the AS_CONFED_SEQUENCE attribute grows to 255 AS numbers or more. A successful exploit could allow the attacker to cause memory corruption, which may cause the BGP process to restart, resulting in a DoS condition. To exploit this vulnerability, an attacker must control a BGP confederation speaker within the same autonomous system as the victim, or the network must be designed in such a manner that the AS_CONFED_SEQUENCE attribute grows to 255 AS numbers or more.

Severity

8.6 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-03-21 20:35 UTC

CWE

CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Assigner

cisco mitre root Scorecard

References

2 references

URL	Tags
https://sec.cloudapps.cisco.com/security/center/c…
https://blog.apnic.net/2024/09/02/crafting-endles…

Impacted products

1 product

Vendor	Product	Version
Cisco	Cisco IOS XR Software	Affected: 6.5.3 Affected: 6.5.29 Affected: 6.5.1 Affected: 6.6.1 Affected: 6.5.2 Affected: 6.5.92 Affected: 6.5.15 Affected: 6.6.2 Affected: 7.0.1 Affected: 6.6.25 Affected: 6.5.26 Affected: 6.6.11 Affected: 6.5.25 Affected: 6.5.28 Affected: 6.5.93 Affected: 6.6.12 Affected: 6.5.90 Affected: 7.0.0 Affected: 7.1.1 Affected: 7.0.90 Affected: 6.6.3 Affected: 6.7.1 Affected: 7.0.2 Affected: 7.1.15 Affected: 7.2.0 Affected: 7.2.1 Affected: 7.1.2 Affected: 6.7.2 Affected: 7.0.11 Affected: 7.0.12 Affected: 7.0.14 Affected: 7.1.25 Affected: 6.6.4 Affected: 7.2.12 Affected: 7.3.1 Affected: 7.1.3 Affected: 6.7.3 Affected: 7.4.1 Affected: 7.2.2 Affected: 6.7.4 Affected: 6.5.31 Affected: 7.3.15 Affected: 7.3.16 Affected: 6.8.1 Affected: 7.4.15 Affected: 6.5.32 Affected: 7.3.2 Affected: 7.5.1 Affected: 7.4.16 Affected: 7.3.27 Affected: 7.6.1 Affected: 7.5.2 Affected: 7.8.1 Affected: 7.6.15 Affected: 7.5.12 Affected: 7.8.12 Affected: 7.3.3 Affected: 7.7.1 Affected: 6.8.2 Affected: 7.3.4 Affected: 7.4.2 Affected: 6.7.35 Affected: 6.9.1 Affected: 7.6.2 Affected: 7.5.3 Affected: 7.7.2 Affected: 6.9.2 Affected: 7.9.1 Affected: 7.10.1 Affected: 7.8.2 Affected: 7.5.4 Affected: 6.5.33 Affected: 7.8.22 Affected: 7.7.21 Affected: 7.9.2 Affected: 7.3.5 Affected: 7.5.5 Affected: 7.11.1 Affected: 7.9.21 Affected: 7.10.2 Affected: 24.1.1 Affected: 7.6.3 Affected: 7.3.6 Affected: 7.5.52 Affected: 7.11.2 Affected: 24.2.1 Affected: 24.1.2 Affected: 24.2.11 Affected: 24.2.2 Affected: 7.8.23 Affected: 7.11.21 Affected: 24.2.20 Affected: 6.5.35

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-20115",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-03-21T20:35:39.499211Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-03-21T20:35:55.101Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Cisco IOS XR Software",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "6.5.3"
            },
            {
              "status": "affected",
              "version": "6.5.29"
            },
            {
              "status": "affected",
              "version": "6.5.1"
            },
            {
              "status": "affected",
              "version": "6.6.1"
            },
            {
              "status": "affected",
              "version": "6.5.2"
            },
            {
              "status": "affected",
              "version": "6.5.92"
            },
            {
              "status": "affected",
              "version": "6.5.15"
            },
            {
              "status": "affected",
              "version": "6.6.2"
            },
            {
              "status": "affected",
              "version": "7.0.1"
            },
            {
              "status": "affected",
              "version": "6.6.25"
            },
            {
              "status": "affected",
              "version": "6.5.26"
            },
            {
              "status": "affected",
              "version": "6.6.11"
            },
            {
              "status": "affected",
              "version": "6.5.25"
            },
            {
              "status": "affected",
              "version": "6.5.28"
            },
            {
              "status": "affected",
              "version": "6.5.93"
            },
            {
              "status": "affected",
              "version": "6.6.12"
            },
            {
              "status": "affected",
              "version": "6.5.90"
            },
            {
              "status": "affected",
              "version": "7.0.0"
            },
            {
              "status": "affected",
              "version": "7.1.1"
            },
            {
              "status": "affected",
              "version": "7.0.90"
            },
            {
              "status": "affected",
              "version": "6.6.3"
            },
            {
              "status": "affected",
              "version": "6.7.1"
            },
            {
              "status": "affected",
              "version": "7.0.2"
            },
            {
              "status": "affected",
              "version": "7.1.15"
            },
            {
              "status": "affected",
              "version": "7.2.0"
            },
            {
              "status": "affected",
              "version": "7.2.1"
            },
            {
              "status": "affected",
              "version": "7.1.2"
            },
            {
              "status": "affected",
              "version": "6.7.2"
            },
            {
              "status": "affected",
              "version": "7.0.11"
            },
            {
              "status": "affected",
              "version": "7.0.12"
            },
            {
              "status": "affected",
              "version": "7.0.14"
            },
            {
              "status": "affected",
              "version": "7.1.25"
            },
            {
              "status": "affected",
              "version": "6.6.4"
            },
            {
              "status": "affected",
              "version": "7.2.12"
            },
            {
              "status": "affected",
              "version": "7.3.1"
            },
            {
              "status": "affected",
              "version": "7.1.3"
            },
            {
              "status": "affected",
              "version": "6.7.3"
            },
            {
              "status": "affected",
              "version": "7.4.1"
            },
            {
              "status": "affected",
              "version": "7.2.2"
            },
            {
              "status": "affected",
              "version": "6.7.4"
            },
            {
              "status": "affected",
              "version": "6.5.31"
            },
            {
              "status": "affected",
              "version": "7.3.15"
            },
            {
              "status": "affected",
              "version": "7.3.16"
            },
            {
              "status": "affected",
              "version": "6.8.1"
            },
            {
              "status": "affected",
              "version": "7.4.15"
            },
            {
              "status": "affected",
              "version": "6.5.32"
            },
            {
              "status": "affected",
              "version": "7.3.2"
            },
            {
              "status": "affected",
              "version": "7.5.1"
            },
            {
              "status": "affected",
              "version": "7.4.16"
            },
            {
              "status": "affected",
              "version": "7.3.27"
            },
            {
              "status": "affected",
              "version": "7.6.1"
            },
            {
              "status": "affected",
              "version": "7.5.2"
            },
            {
              "status": "affected",
              "version": "7.8.1"
            },
            {
              "status": "affected",
              "version": "7.6.15"
            },
            {
              "status": "affected",
              "version": "7.5.12"
            },
            {
              "status": "affected",
              "version": "7.8.12"
            },
            {
              "status": "affected",
              "version": "7.3.3"
            },
            {
              "status": "affected",
              "version": "7.7.1"
            },
            {
              "status": "affected",
              "version": "6.8.2"
            },
            {
              "status": "affected",
              "version": "7.3.4"
            },
            {
              "status": "affected",
              "version": "7.4.2"
            },
            {
              "status": "affected",
              "version": "6.7.35"
            },
            {
              "status": "affected",
              "version": "6.9.1"
            },
            {
              "status": "affected",
              "version": "7.6.2"
            },
            {
              "status": "affected",
              "version": "7.5.3"
            },
            {
              "status": "affected",
              "version": "7.7.2"
            },
            {
              "status": "affected",
              "version": "6.9.2"
            },
            {
              "status": "affected",
              "version": "7.9.1"
            },
            {
              "status": "affected",
              "version": "7.10.1"
            },
            {
              "status": "affected",
              "version": "7.8.2"
            },
            {
              "status": "affected",
              "version": "7.5.4"
            },
            {
              "status": "affected",
              "version": "6.5.33"
            },
            {
              "status": "affected",
              "version": "7.8.22"
            },
            {
              "status": "affected",
              "version": "7.7.21"
            },
            {
              "status": "affected",
              "version": "7.9.2"
            },
            {
              "status": "affected",
              "version": "7.3.5"
            },
            {
              "status": "affected",
              "version": "7.5.5"
            },
            {
              "status": "affected",
              "version": "7.11.1"
            },
            {
              "status": "affected",
              "version": "7.9.21"
            },
            {
              "status": "affected",
              "version": "7.10.2"
            },
            {
              "status": "affected",
              "version": "24.1.1"
            },
            {
              "status": "affected",
              "version": "7.6.3"
            },
            {
              "status": "affected",
              "version": "7.3.6"
            },
            {
              "status": "affected",
              "version": "7.5.52"
            },
            {
              "status": "affected",
              "version": "7.11.2"
            },
            {
              "status": "affected",
              "version": "24.2.1"
            },
            {
              "status": "affected",
              "version": "24.1.2"
            },
            {
              "status": "affected",
              "version": "24.2.11"
            },
            {
              "status": "affected",
              "version": "24.2.2"
            },
            {
              "status": "affected",
              "version": "7.8.23"
            },
            {
              "status": "affected",
              "version": "7.11.21"
            },
            {
              "status": "affected",
              "version": "24.2.20"
            },
            {
              "status": "affected",
              "version": "6.5.35"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in confederation implementation for the Border Gateway Protocol (BGP)\u0026nbsp;in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.\r\n\r\nThis vulnerability is due to a memory corruption that occurs when a BGP update is created with an AS_CONFED_SEQUENCE attribute that has 255 autonomous system numbers (AS numbers). An attacker could exploit this vulnerability by sending a crafted BGP update message, or the network could be designed in such a manner that the AS_CONFED_SEQUENCE attribute grows to 255 AS numbers or more. A successful exploit could allow the attacker to cause memory corruption, which may cause the BGP process to restart, resulting in a DoS condition. To exploit this vulnerability, an attacker must control a BGP confederation speaker within the same autonomous system as the victim, or the network must be designed in such a manner that the AS_CONFED_SEQUENCE attribute grows to 255 AS numbers or more."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco PSIRT is aware of a public announcement about this issue. This announcement is not specific to Cisco IOS XR Software and can be found at .\r\n\r\nThe Cisco PSIRT is not aware of any malicious use of the vulnerability that is described in this advisory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "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:H",
            "version": "3.1"
          },
          "format": "cvssV3_1"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-120",
              "description": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)",
              "lang": "en",
              "type": "cwe"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-03-12T16:11:58.731Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "cisco-sa-iosxr-bgp-dos-O7stePhX",
          "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-bgp-dos-O7stePhX"
        },
        {
          "name": "Crafting endless AS-PATHS in BGP",
          "url": "https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/"
        }
      ],
      "source": {
        "advisory": "cisco-sa-iosxr-bgp-dos-O7stePhX",
        "defects": [
          "CSCwk15887"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Cisco IOS XR Software Border Gateway Protocol Denial of Service Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2025-20115",
    "datePublished": "2025-03-12T16:11:58.731Z",
    "dateReserved": "2024-10-10T19:15:13.210Z",
    "dateUpdated": "2025-03-21T20:35:55.101Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.
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EUVD-2026-224405

CVE-2025-20115 (GCVE-0-2025-20115)

Tags

Sightings

Nomenclature

Related by attack behaviour