SB2025091126 - Denial of service in Cisco IOS XR
Published: September 11, 2025
Security Bulletin ID
SB2025091126
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Resource exhaustion (CVE-ID: CVE-2025-20340)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources in the Address Resolution Protocol (ARP) implementation. A remote attacker on the local network can trigger resource exhaustion and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.