CVE-2025-20209CWE-770

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

High · published March 12, 2025

CVSS v3.1
7.5
EPSS
1%
Percentile
45.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00549 · 45.2th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2025-03-12T16:13Z
EPSS history
Timeline
  • 12 MAR 16:13Z
    Cisco IOS XR Software Internet Key Exchange Version 2 Denial of Service Vulnerability
    cvelistv5