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Vulnerable Software

Vulnerability Details CVE-2025-20209

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 31.8%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2025-20209
  • Cisco » Ncs 1004 » Version: N/A
    cpe:2.3:h:cisco:ncs_1004:-
  • Cisco » Ncs 1010 » Version: N/A
    cpe:2.3:h:cisco:ncs_1010:-
  • Cisco » Ncs 1014 » Version: N/A
    cpe:2.3:h:cisco:ncs_1014:-
  • Cisco » Ncs 540l » Version: N/A
    cpe:2.3:h:cisco:ncs_540l:-
  • Cisco » Ios Xr » Version: 24.1.1
    cpe:2.3:o:cisco:ios_xr:24.1.1
  • Cisco » Ios Xr » Version: 24.1.2
    cpe:2.3:o:cisco:ios_xr:24.1.2
  • Cisco » Ios Xr » Version: 24.2.1
    cpe:2.3:o:cisco:ios_xr:24.2.1
  • Cisco » Ios Xr » Version: 24.2.11
    cpe:2.3:o:cisco:ios_xr:24.2.11
  • Cisco » Ios Xr » Version: 6.5.1
    cpe:2.3:o:cisco:ios_xr:6.5.1
  • Cisco » Ios Xr » Version: 6.5.2
    cpe:2.3:o:cisco:ios_xr:6.5.2
  • Cisco » Ios Xr » Version: 6.5.3
    cpe:2.3:o:cisco:ios_xr:6.5.3
  • Cisco » Ios Xr » Version: 6.6.1
    cpe:2.3:o:cisco:ios_xr:6.6.1
  • Cisco » Ios Xr » Version: 6.6.2
    cpe:2.3:o:cisco:ios_xr:6.6.2
  • Cisco » Ios Xr » Version: 6.6.25
    cpe:2.3:o:cisco:ios_xr:6.6.25
  • Cisco » Ios Xr » Version: 6.6.3
    cpe:2.3:o:cisco:ios_xr:6.6.3
  • Cisco » Ios Xr » Version: 7.0.0
    cpe:2.3:o:cisco:ios_xr:7.0.0
  • Cisco » Ios Xr » Version: 7.0.1
    cpe:2.3:o:cisco:ios_xr:7.0.1
  • Cisco » Ios Xr » Version: 7.0.2
    cpe:2.3:o:cisco:ios_xr:7.0.2
  • Cisco » Ios Xr » Version: 7.1.1
    cpe:2.3:o:cisco:ios_xr:7.1.1
  • Cisco » Ios Xr » Version: 7.1.2
    cpe:2.3:o:cisco:ios_xr:7.1.2
  • Cisco » Ios Xr » Version: 7.10.1
    cpe:2.3:o:cisco:ios_xr:7.10.1
  • Cisco » Ios Xr » Version: 7.10.2
    cpe:2.3:o:cisco:ios_xr:7.10.2
  • Cisco » Ios Xr » Version: 7.11.1
    cpe:2.3:o:cisco:ios_xr:7.11.1
  • Cisco » Ios Xr » Version: 7.11.2
    cpe:2.3:o:cisco:ios_xr:7.11.2
  • Cisco » Ios Xr » Version: 7.2.0
    cpe:2.3:o:cisco:ios_xr:7.2.0
  • Cisco » Ios Xr » Version: 7.2.1
    cpe:2.3:o:cisco:ios_xr:7.2.1
  • Cisco » Ios Xr » Version: 7.2.2
    cpe:2.3:o:cisco:ios_xr:7.2.2
  • Cisco » Ios Xr » Version: 7.3.1
    cpe:2.3:o:cisco:ios_xr:7.3.1
  • Cisco » Ios Xr » Version: 7.3.2
    cpe:2.3:o:cisco:ios_xr:7.3.2
  • Cisco » Ios Xr » Version: 7.3.27
    cpe:2.3:o:cisco:ios_xr:7.3.27
  • Cisco » Ios Xr » Version: 7.4.1
    cpe:2.3:o:cisco:ios_xr:7.4.1
  • Cisco » Ios Xr » Version: 7.4.2
    cpe:2.3:o:cisco:ios_xr:7.4.2
  • Cisco » Ios Xr » Version: 7.5.1
    cpe:2.3:o:cisco:ios_xr:7.5.1
  • Cisco » Ios Xr » Version: 7.5.2
    cpe:2.3:o:cisco:ios_xr:7.5.2
  • Cisco » Ios Xr » Version: 7.6.1
    cpe:2.3:o:cisco:ios_xr:7.6.1
  • Cisco » Ios Xr » Version: 7.6.2
    cpe:2.3:o:cisco:ios_xr:7.6.2
  • Cisco » Ios Xr » Version: 7.7.1
    cpe:2.3:o:cisco:ios_xr:7.7.1
  • Cisco » Ios Xr » Version: 7.7.2
    cpe:2.3:o:cisco:ios_xr:7.7.2
  • Cisco » Ios Xr » Version: 7.7.21
    cpe:2.3:o:cisco:ios_xr:7.7.21
  • Cisco » Ios Xr » Version: 7.8.1
    cpe:2.3:o:cisco:ios_xr:7.8.1
  • Cisco » Ios Xr » Version: 7.8.2
    cpe:2.3:o:cisco:ios_xr:7.8.2
  • Cisco » Ios Xr » Version: 7.8.22
    cpe:2.3:o:cisco:ios_xr:7.8.22
  • Cisco » Ios Xr » Version: 7.9.1
    cpe:2.3:o:cisco:ios_xr:7.9.1
  • Cisco » Ios Xr » Version: 7.9.2
    cpe:2.3:o:cisco:ios_xr:7.9.2


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