Buffer overflow in Cisco IOS XE - CVE-2025-20149

 

Buffer overflow in Cisco IOS XE - CVE-2025-20149

Published: September 24, 2025


Vulnerability identifier: #VU116084
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-20149
CWE-ID: CWE-120
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to perform a denial of service attack.

The vulnerability exists due to improper input validation in CLI. A local user can pass specially crafted data to the affected CLI command, trigger buffer overflow and perform a denial of service attack. 


Affected software

Cisco IOS XE

How to mitigate CVE-2025-20149

Install updates from vendor's website.

Cisco IOS XE - addressed in versions 16.12.13, 17.9.7, 17.12.5, 17.15.3

External References

Related Security Bulletins