Infinite loop in Cisco IOS XE - CVE-2025-20312
Published: September 24, 2025
Vulnerability identifier: #VU116082
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-20312
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop when parsing certain SNMP requests. A remote user can send a specially crafted SNMP request to the system and crash the system.
Affected software
Cisco IOS XE
How to mitigate CVE-2025-20312
Install updates from vendor's website.
Cisco IOS XE - addressed in versions 17.12.6, 17.15.4