Main Vulnerability Database Vulnerabilities #VU105690

Allocation of Resources Without Limits or Throttling in Cisco Systems, Inc products - CVE-2025-20209

Published: March 13, 2025

Vulnerability identifier: #VU105690

CSH Severity: High

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-20209

CWE-ID: CWE-770

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper handling of malformed packets in the Internet Key Exchange version 2 (IKEv2) function. A remote attacker can send specially crafted IKEv2 packets and cause a denial of service condition on the target system.

Affected software

Cisco IOS XR
NCS 540L
NCS 1004
NCS 1010
NCS 1014

How to mitigate CVE-2025-20209

Install updates from vendor's website.

Cisco IOS XR - addressed in versions 7.11.21, 24.2.2, 24.2.20, 24.3.1, 24.3.2, 24.3.20, 24.4.1, 24.4.10

External References

Related Security Bulletins