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240 vulnerabilities by ZyXEL
CVE-2026-14818 (GCVE-0-2026-14818)
Vulnerability from nvd – Published: 2026-08-04 02:28 – Updated: 2026-08-04 18:45
VLAI
EPSS
VEX
Summary
A path traversal vulnerability in the CLI command used to execute configuration files in Zyxel ATP series firmware versions from V4.32 through V5.42 Patch 1, USG FLEX series firmware versions from V4.50 through V5.42 Patch 1, USG FLEX 50(W) series firmware versions from V4.16 through V5.42 Patch 1, and USG20(W)-VPN series firmware versions from V4.16 through V5.42 Patch 1 could allow an authenticated attacker with administrator privileges to execute a crafted malicious configuration file on an affected device.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 18:45 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | ATP series firmware |
Affected:
from V4.32 through V5.42 Patch 1
|
|
| Zyxel | USG FLEX series firmware |
Affected:
from V4.50 through V5.42 Patch 1
|
|
| Zyxel | USG FLEX 50(W) series firmware |
Affected:
from V4.16 through V5.42 Patch 1
|
|
| Zyxel | USG20(W)-VPN series firmware |
Affected:
from V4.16 through V5.42 Patch 1
|
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CVE-2026-8508 (GCVE-0-2026-8508)
Vulnerability from nvd – Published: 2026-08-04 01:57 – Updated: 2026-08-04 18:46
VLAI
EPSS
VEX
Summary
An improper authentication vulnerability in the "social_login.cgi" CGI program in Zyxel WAX650S firmware versions through 7.10(ABRM.4)C0 could allow an attacker on the WLAN to bypass captive portal authentication.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 18:46 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | WAX650S firmware |
Affected:
<= 7.10(ABRM.4)C0
|
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CVE-2026-6837 (GCVE-0-2026-6837)
Vulnerability from nvd – Published: 2026-08-04 01:52 – Updated: 2026-08-05 03:56
VLAI
EPSS
VEX
Summary
A post-authentication command injection vulnerability in the "export-cgi" CGI program in Zyxel WAX650S firmware versions through 7.10(ABRM.4)C0 could allow an authenticated attacker with administrator privileges to execute OS commands on an affected device.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 00:00 UTC
CWE
- CWE-78 - Improper neutralization of special elements used in an OS command ('OS command injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | WAX650S firmware |
Affected:
<= 7.10(ABRM.4)C0
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CVE-2026-6952 (GCVE-0-2026-6952)
Vulnerability from nvd – Published: 2026-07-21 02:00 – Updated: 2026-07-23 03:56
VLAI
EPSS
VEX
Summary
A post-authentication command injection vulnerability in the "LogServer" field of the syslog component in Zyxel AX7501-B1 firmware versions through 5.17(ABPC.7.2)C0 could allow an authenticated attacker with administrator privileges to execute OS commands on an affected device.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 00:00 UTC
CWE
- CWE-78 - Improper neutralization of special elements used in an OS command ('OS command injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | AX7501-B1 firmware |
Affected:
<= 5.17(ABPC.7.2)C0
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CVE-2026-3871 (GCVE-0-2026-3871)
Vulnerability from nvd – Published: 2026-06-02 02:04 – Updated: 2026-06-02 13:34
VLAI
EPSS
VEX
Summary
A buffer overflow vulnerability in the UPnP DeletePortMapping() command in Zyxel VMG4005-B50B firmware versions through 5.13(ABRL.5.4)C0 could allow an adjacent attacker to trigger a temporary denial-of-service (DoS) condition affecting the UPnP function of the affected device.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-02 13:33 UTC
CWE
- CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | VMG4005-B50B firmware |
Affected:
<= 5.13(ABRL.5.4)C0
|
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CVE-2026-3870 (GCVE-0-2026-3870)
Vulnerability from nvd – Published: 2026-06-02 01:54 – Updated: 2026-06-02 13:36
VLAI
EPSS
VEX
Summary
A buffer overflow vulnerability in the UPnP AddPortMapping() command in Zyxel VMG4005-B50B firmware versions through 5.13(ABRL.5.4)C0 could allow an adjacent attacker to trigger a temporary denial-of-service (DoS) condition affecting the UPnP function of the affected device.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-02 13:36 UTC
CWE
- CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | VMG4005-B50B firmware |
Affected:
<= 5.13(ABRL.5.4)C0
|
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CVE-2026-4795 (GCVE-0-2026-4795)
Vulnerability from nvd – Published: 2026-05-26 01:42 – Updated: 2026-05-26 12:18
VLAI
EPSS
VEX
Summary
A missing authorization vulnerability in Zyxel GS1200-5v3 firmware versions through 1.00(ACPS.2)C0, GS1200-8v3 firmware versions through 1.00(ACPT.2)C0, GS1200-5HPv3 firmware versions through 1.00(ACPU.2)C0, GS1200-8HPv3 firmware versions through 1.00(ACPV.2)C0, and GS1200-10v3 firmware versions through 1.00(ACPW.2)C0 could allow a LAN-based, unauthenticated attacker to read the system configuration from a log file via a crafted HTTP request.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-26 12:17 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | GS1200-5v3 firmware |
Affected:
<= 1.00(ACPS.2)C0
|
|
| Zyxel | GS1200-8v3 firmware |
Affected:
<= 1.00(ACPT.2)C0
|
|
| Zyxel | GS1200-5HPv3 firmware |
Affected:
<= 1.00(ACPU.2)C0
|
|
| Zyxel | GS1200-8HPv3 firmware |
Affected:
<= 1.00(ACPV.2)C0
|
|
| Zyxel | GS1200-10v3 firmware |
Affected:
<= 1.00(ACPW.2)C0
|
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CVE-2025-11730 (GCVE-0-2025-11730)
Vulnerability from nvd – Published: 2026-02-05 01:55 – Updated: 2026-02-26 15:04
VLAI
EPSS
VEX
Summary
A post‑authentication command injection vulnerability in the Dynamic DNS (DDNS) configuration CLI command in Zyxel ATP series firmware versions from V5.35 through V5.41, USG FLEX series firmware versions from V5.35 through V5.41, USG FLEX 50(W) series firmware versions from V5.35 through V5.41, and USG20(W)-VPN series firmware versions from V5.35 through V5.41 could allow an authenticated attacker with administrator privileges to execute operating system (OS) commands on an affected device by supplying a specially crafted string as an argument to the CLI command.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-06 04:55 UTC
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | ATP series firmware |
Affected:
versions from V5.35 through V5.41
|
|
| Zyxel | USG FLEX series firmware |
Affected:
versions from V5.35 through V5.41
|
|
| Zyxel | USG FLEX 50(W) series firmware |
Affected:
versions from V5.35 through V5.41
|
|
| Zyxel | USG20(W)-VPN series firmware |
Affected:
versions from V5.35 through V5.41
|
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CVE-2023-5593 (GCVE-0-2023-5593)
Vulnerability from nvd – Published: 2023-11-20 12:03 – Updated: 2024-08-29 20:47
VLAI
EPSS
VEX
Summary
The out-of-bounds write vulnerability in the Windows-based SecuExtender SSL VPN Client software version 4.0.4.0 could allow an authenticated local user to gain a privilege escalation by sending a crafted CREATE message.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-29 20:47 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | SecuExtender SSL VPN Client |
Affected:
4.0.4.0
|
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CVE-2020-15347 (GCVE-0-2020-15347)
Vulnerability from nvd – Published: 2020-06-26 14:51 – Updated: 2024-08-04 13:15
VLAI
EPSS
VEX
Summary
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has the q6xV4aW8bQ4cfD-b password for the axiros account.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://pierrekim.github.io/blog/2020-03-09-zyxel… | x_refsource_MISC |
| https://www.zyxel.com/support/vulnerabilities-of-… | x_refsource_MISC |
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CVE-2020-15346 (GCVE-0-2020-15346)
Vulnerability from nvd – Published: 2020-06-26 14:53 – Updated: 2024-08-04 13:15
VLAI
EPSS
VEX
Summary
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a /live/GLOBALS API with the CLOUDCNM key.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://pierrekim.github.io/blog/2020-03-09-zyxel… | x_refsource_MISC |
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CVE-2020-15345 (GCVE-0-2020-15345)
Vulnerability from nvd – Published: 2020-06-26 14:53 – Updated: 2024-08-04 13:15
VLAI
EPSS
VEX
Summary
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has an unauthenticated zy_get_instances_for_update API.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://pierrekim.github.io/blog/2020-03-09-zyxel… | x_refsource_MISC |
| https://www.zyxel.com/support/vulnerabilities-of-… | x_refsource_MISC |
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CVE-2020-15344 (GCVE-0-2020-15344)
Vulnerability from nvd – Published: 2020-06-26 14:54 – Updated: 2024-08-04 13:15
VLAI
EPSS
VEX
Summary
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has an unauthenticated zy_get_user_id_and_key API.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://pierrekim.github.io/blog/2020-03-09-zyxel… | x_refsource_MISC |
| https://www.zyxel.com/support/vulnerabilities-of-… | x_refsource_MISC |
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CVE-2020-15343 (GCVE-0-2020-15343)
Vulnerability from nvd – Published: 2020-06-26 14:55 – Updated: 2024-08-04 13:15
VLAI
EPSS
VEX
Summary
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has an unauthenticated zy_install_user_key API.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://pierrekim.github.io/blog/2020-03-09-zyxel… | x_refsource_MISC |
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CVE-2020-15342 (GCVE-0-2020-15342)
Vulnerability from nvd – Published: 2020-06-26 14:56 – Updated: 2024-08-04 13:15
VLAI
EPSS
VEX
Summary
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has an unauthenticated zy_install_user API.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://pierrekim.github.io/blog/2020-03-09-zyxel… | x_refsource_MISC |
| https://www.zyxel.com/support/vulnerabilities-of-… | x_refsource_MISC |
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CVE-2020-15341 (GCVE-0-2020-15341)
Vulnerability from nvd – Published: 2020-06-26 14:57 – Updated: 2024-08-04 13:15
VLAI
EPSS
VEX
Summary
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has an unauthenticated update_all_realm_license API.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://pierrekim.github.io/blog/2020-03-09-zyxel… | x_refsource_MISC |
| https://www.zyxel.com/support/vulnerabilities-of-… | x_refsource_MISC |
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CVE-2020-15340 (GCVE-0-2020-15340)
Vulnerability from nvd – Published: 2020-06-26 14:58 – Updated: 2024-08-04 13:15
VLAI
EPSS
VEX
Summary
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a hardcoded opt/axess/AXAssets/default_axess/axess/TR69/Handlers/turbolink/sshkeys/id_rsa SSH key.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://pierrekim.github.io/blog/2020-03-09-zyxel… | x_refsource_MISC |
| https://www.zyxel.com/support/vulnerabilities-of-… | x_refsource_MISC |
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CVE-2020-15339 (GCVE-0-2020-15339)
Vulnerability from nvd – Published: 2020-06-26 14:58 – Updated: 2024-08-04 13:15
VLAI
EPSS
VEX
Summary
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 allows live/CPEManager/AXCampaignManager/handle_campaign_script_link?script_name= XSS.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://pierrekim.github.io/blog/2020-03-09-zyxel… | x_refsource_MISC |
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CVE-2020-15338 (GCVE-0-2020-15338)
Vulnerability from nvd – Published: 2020-06-26 15:00 – Updated: 2024-08-04 13:15
VLAI
EPSS
VEX
Summary
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a "Use of GET Request Method With Sensitive Query Strings" issue for /cnr requests.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://pierrekim.github.io/blog/2020-03-09-zyxel… | x_refsource_MISC |
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CVE-2020-15337 (GCVE-0-2020-15337)
Vulnerability from nvd – Published: 2020-06-26 15:00 – Updated: 2024-08-04 13:15
VLAI
EPSS
VEX
Summary
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a "Use of GET Request Method With Sensitive Query Strings" issue for /registerCpe requests.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://pierrekim.github.io/blog/2020-03-09-zyxel… | x_refsource_MISC |
| https://www.zyxel.com/support/vulnerabilities-of-… | x_refsource_MISC |
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CVE-2020-15334 (GCVE-0-2020-15334)
Vulnerability from nvd – Published: 2020-06-26 15:02 – Updated: 2024-08-04 13:15
VLAI
EPSS
VEX
Summary
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 allows escape-sequence injection into the /var/log/axxmpp.log file.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://pierrekim.github.io/blog/2020-03-09-zyxel… | x_refsource_MISC |
| https://www.zyxel.com/support/vulnerabilities-of-… | x_refsource_MISC |
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CVE-2026-14818 (GCVE-0-2026-14818)
Vulnerability from cvelistv5 – Published: 2026-08-04 02:28 – Updated: 2026-08-04 18:45
VLAI
EPSS
VEX
Summary
A path traversal vulnerability in the CLI command used to execute configuration files in Zyxel ATP series firmware versions from V4.32 through V5.42 Patch 1, USG FLEX series firmware versions from V4.50 through V5.42 Patch 1, USG FLEX 50(W) series firmware versions from V4.16 through V5.42 Patch 1, and USG20(W)-VPN series firmware versions from V4.16 through V5.42 Patch 1 could allow an authenticated attacker with administrator privileges to execute a crafted malicious configuration file on an affected device.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 18:45 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | ATP series firmware |
Affected:
from V4.32 through V5.42 Patch 1
|
|
| Zyxel | USG FLEX series firmware |
Affected:
from V4.50 through V5.42 Patch 1
|
|
| Zyxel | USG FLEX 50(W) series firmware |
Affected:
from V4.16 through V5.42 Patch 1
|
|
| Zyxel | USG20(W)-VPN series firmware |
Affected:
from V4.16 through V5.42 Patch 1
|
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CVE-2026-8508 (GCVE-0-2026-8508)
Vulnerability from cvelistv5 – Published: 2026-08-04 01:57 – Updated: 2026-08-04 18:46
VLAI
EPSS
VEX
Summary
An improper authentication vulnerability in the "social_login.cgi" CGI program in Zyxel WAX650S firmware versions through 7.10(ABRM.4)C0 could allow an attacker on the WLAN to bypass captive portal authentication.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 18:46 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | WAX650S firmware |
Affected:
<= 7.10(ABRM.4)C0
|
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CVE-2026-6837 (GCVE-0-2026-6837)
Vulnerability from cvelistv5 – Published: 2026-08-04 01:52 – Updated: 2026-08-05 03:56
VLAI
EPSS
VEX
Summary
A post-authentication command injection vulnerability in the "export-cgi" CGI program in Zyxel WAX650S firmware versions through 7.10(ABRM.4)C0 could allow an authenticated attacker with administrator privileges to execute OS commands on an affected device.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 00:00 UTC
CWE
- CWE-78 - Improper neutralization of special elements used in an OS command ('OS command injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | WAX650S firmware |
Affected:
<= 7.10(ABRM.4)C0
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CVE-2026-6952 (GCVE-0-2026-6952)
Vulnerability from cvelistv5 – Published: 2026-07-21 02:00 – Updated: 2026-07-23 03:56
VLAI
EPSS
VEX
Summary
A post-authentication command injection vulnerability in the "LogServer" field of the syslog component in Zyxel AX7501-B1 firmware versions through 5.17(ABPC.7.2)C0 could allow an authenticated attacker with administrator privileges to execute OS commands on an affected device.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 00:00 UTC
CWE
- CWE-78 - Improper neutralization of special elements used in an OS command ('OS command injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | AX7501-B1 firmware |
Affected:
<= 5.17(ABPC.7.2)C0
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CVE-2026-3871 (GCVE-0-2026-3871)
Vulnerability from cvelistv5 – Published: 2026-06-02 02:04 – Updated: 2026-06-02 13:34
VLAI
EPSS
VEX
Summary
A buffer overflow vulnerability in the UPnP DeletePortMapping() command in Zyxel VMG4005-B50B firmware versions through 5.13(ABRL.5.4)C0 could allow an adjacent attacker to trigger a temporary denial-of-service (DoS) condition affecting the UPnP function of the affected device.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-02 13:33 UTC
CWE
- CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | VMG4005-B50B firmware |
Affected:
<= 5.13(ABRL.5.4)C0
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CVE-2026-3870 (GCVE-0-2026-3870)
Vulnerability from cvelistv5 – Published: 2026-06-02 01:54 – Updated: 2026-06-02 13:36
VLAI
EPSS
VEX
Summary
A buffer overflow vulnerability in the UPnP AddPortMapping() command in Zyxel VMG4005-B50B firmware versions through 5.13(ABRL.5.4)C0 could allow an adjacent attacker to trigger a temporary denial-of-service (DoS) condition affecting the UPnP function of the affected device.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-02 13:36 UTC
CWE
- CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | VMG4005-B50B firmware |
Affected:
<= 5.13(ABRL.5.4)C0
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CVE-2026-4795 (GCVE-0-2026-4795)
Vulnerability from cvelistv5 – Published: 2026-05-26 01:42 – Updated: 2026-05-26 12:18
VLAI
EPSS
VEX
Summary
A missing authorization vulnerability in Zyxel GS1200-5v3 firmware versions through 1.00(ACPS.2)C0, GS1200-8v3 firmware versions through 1.00(ACPT.2)C0, GS1200-5HPv3 firmware versions through 1.00(ACPU.2)C0, GS1200-8HPv3 firmware versions through 1.00(ACPV.2)C0, and GS1200-10v3 firmware versions through 1.00(ACPW.2)C0 could allow a LAN-based, unauthenticated attacker to read the system configuration from a log file via a crafted HTTP request.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-26 12:17 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | GS1200-5v3 firmware |
Affected:
<= 1.00(ACPS.2)C0
|
|
| Zyxel | GS1200-8v3 firmware |
Affected:
<= 1.00(ACPT.2)C0
|
|
| Zyxel | GS1200-5HPv3 firmware |
Affected:
<= 1.00(ACPU.2)C0
|
|
| Zyxel | GS1200-8HPv3 firmware |
Affected:
<= 1.00(ACPV.2)C0
|
|
| Zyxel | GS1200-10v3 firmware |
Affected:
<= 1.00(ACPW.2)C0
|
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CVE-2025-11730 (GCVE-0-2025-11730)
Vulnerability from cvelistv5 – Published: 2026-02-05 01:55 – Updated: 2026-02-26 15:04
VLAI
EPSS
VEX
Summary
A post‑authentication command injection vulnerability in the Dynamic DNS (DDNS) configuration CLI command in Zyxel ATP series firmware versions from V5.35 through V5.41, USG FLEX series firmware versions from V5.35 through V5.41, USG FLEX 50(W) series firmware versions from V5.35 through V5.41, and USG20(W)-VPN series firmware versions from V5.35 through V5.41 could allow an authenticated attacker with administrator privileges to execute operating system (OS) commands on an affected device by supplying a specially crafted string as an argument to the CLI command.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-06 04:55 UTC
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | ATP series firmware |
Affected:
versions from V5.35 through V5.41
|
|
| Zyxel | USG FLEX series firmware |
Affected:
versions from V5.35 through V5.41
|
|
| Zyxel | USG FLEX 50(W) series firmware |
Affected:
versions from V5.35 through V5.41
|
|
| Zyxel | USG20(W)-VPN series firmware |
Affected:
versions from V5.35 through V5.41
|
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CVE-2023-5593 (GCVE-0-2023-5593)
Vulnerability from cvelistv5 – Published: 2023-11-20 12:03 – Updated: 2024-08-29 20:47
VLAI
EPSS
VEX
Summary
The out-of-bounds write vulnerability in the Windows-based SecuExtender SSL VPN Client software version 4.0.4.0 could allow an authenticated local user to gain a privilege escalation by sending a crafted CREATE message.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-29 20:47 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | SecuExtender SSL VPN Client |
Affected:
4.0.4.0
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