CVE-2025-20209
Cisco IOS XR Software Internet Key Exchange Version 2 Denial of Service Vulnerability
Description
A vulnerability in the Internet Key Exchange version 2 (IKEv2) function of Cisco IOS XR Software could allow an unauthenticated, remote attacker to prevent an affected device from processing any control plane UDP packets. This vulnerability is due to improper handling of malformed IKEv2 packets. An attacker could exploit this vulnerability by sending malformed IKEv2 packets to an affected device. A successful exploit could allow the attacker to prevent the affected device from processing any control plane UDP packets, resulting in a denial of service (DoS) condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Weakness: CWE-770
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco IOS XR Software | Routing & Switching | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco IOS XR Software
Vendor advisory
Cisco IOS XR Software Internet Key Exchange Version 2 Denial of Service Vulnerability
Cisco’s rating: High (advisory CVSS 7.5) · Published Mar 12, 2025
Bug ID: CSCwk64612
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from