SB2025092461 - Denial of service in Cisco IOS XE SNMP subsystem
Published: September 24, 2025
Security Bulletin ID
SB2025092461
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Infinite loop (CVE-ID: CVE-2025-20312)
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.
Remediation
Install update from vendor's website.