7.5

CVE-2025-20209: cisco cisco ios xr software

CVSS: 7.5v3.1HighAnalyzed
Published 12-03-2025Last modified 12-03-2025
Open JSON

Vulnerability summary

CVE-2025-20209 is a high (CVSS 7.5) vulnerability in cisco cisco ios xr software. EPSS estimates a 0.55% chance of exploitation in the next 30 days, higher than 44.7% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.55%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 12-03-2025
    PublishedVulnerability first disclosed.
  2. 12-03-2025
    Last modifiedVulnerability information updated.

Description

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 metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.55%

Chance of exploitation in the next 30 days

Percentile

45%

Versus all other CVEs

30-day change

+0.01 pp

From 0.54% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.55%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco2 products
  • cisco ios xr software6.5.3 | 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 | 7.10.1 | 7.7.21 | 7.9.2 | 7.11.1 | 7.10.2 | 24.1.1 | 7.11.2 | 24.2.1 | 24.1.2 | 24.2.11
  • ios_xr6.5.1 | 6.5.2 | 6.5.3 | 6.6.1 | 6.6.2 | 6.6.3 | 6.6.25 | 7.0.0 | 7.0.1 | 7.0.2 | 7.1.1 | 7.1.2 | 7.2.0 | 7.2.1 | 7.2.2 | 7.3.1 | 7.3.2 | 7.3.27 | 7.4.1 | 7.4.2 | 7.5.1 | 7.5.2 | 7.6.1 | 7.6.2 | 7.7.1 | 7.7.2 | 7.7.21 | 7.8.1 | 7.8.2 | 7.8.22 | 7.9.1 | 7.9.2 | 7.10.1 | 7.10.2 | 7.11.1 | 7.11.2 | 24.1.1 | 24.1.2 | 24.2.1 | 24.2.11

1 vendor · 2 products

References

2 links