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CVE-2025-20209

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

Published
Last modified
published
Not listed in CISA KEV
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • Cisco Cisco IOS XR Software

    6.5.3, 6.6.1, 6.5.2, 6.6.2, 6.5.1, 7.0.1, 6.6.25, 7.0.0, 7.1.1, 6.6.3, 7.0.2, 7.2.0, 7.1.2, 7.2.1, 7.3.1, 7.4.1, 7.2.2, 7.3.2, 7.5.1, 7.3.27, 7.6.1, 7.5.2, 7.7.1, 7.4.2, 7.6.2, 7.8.1, 7.7.2, 7.9.1, 7.8.2, 7.8.22, and 10 more

References 2

sec.cloudapps.cisco.com

blog.apnic.net