CVE-2025-20209

Cisco IOS XR Software Internet Key Exchange Version 2 Denial of Service Vulnerability

CVSS 7.5 HIGHEPSS 0.5%CWE-770

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.5EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

12 Mar 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Cisco · Cisco IOS XR Software

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

References

https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xrike-9wYGpRGq