6.7

CVE-2025-20143: cisco cisco ios xr software

CVSS: 6.7v3.1MediumAnalyzed
Published 12-03-2025Last modified 26-02-2026
Open JSON

Vulnerability summary

CVE-2025-20143 is a medium (CVSS 6.7) vulnerability in cisco cisco ios xr software. EPSS estimates a 0.11% chance of exploitation in the next 30 days, higher than 1.2% of scored vulnerabilities.

Overall risk
27/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.7/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.11%
0%100%
Low · 0.00 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. 26-02-2026
    Last modifiedVulnerability information updated.

Description

A vulnerability in the boot process of Cisco IOS XR Software could allow an authenticated, local attacker with high privileges to bypass the Secure Boot functionality and load unverified software on an affected device. To exploit this vulnerability, the attacker must have root-system privileges on the affected device. This vulnerability is due to insufficient verification of modules in the software load process. An attacker could exploit this vulnerability by manipulating the loaded binaries to bypass some of the integrity checks that are performed during the booting process. A successful exploit could allow the attacker to control the boot configuration, which could enable them to bypass the requirement to run Cisco-signed images or alter the security properties of the running system. Note: This vulnerability affects Cisco IOS XR Software, not the Secure Boot feature. 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

0.11%

Chance of exploitation in the next 30 days

Percentile

1%

Versus all other CVEs

30-day change

0.00 pp

From 0.11% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.11%

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 | 6.5.2 | 6.5.92 | 6.5.1 | 6.5.15 | 6.6.2 | 7.0.1 | 6.6.25 | 6.6.1 | 6.6.11 | 6.5.93 | 6.6.12 | 7.0.0 | 7.1.1 | 7.0.90 | 6.6.3 | 6.7.1 | 7.0.2 | 7.1.15 | 7.2.0 | 7.2.1 | 7.1.2 | 6.7.2 | 7.1.25 | 6.6.4 | 7.3.1 | 7.1.3 | 6.7.3 | 7.4.1 | 7.2.2 | 6.8.1 | 7.4.15 | 7.3.2 | 7.5.1 | 7.4.16 | 7.3.27 | 7.6.1 | 7.5.2 | 7.6.15 | 7.3.3 | 7.7.1 | 6.8.2 | 7.4.2 | 7.3.4 | 6.7.35 | 6.9.1 | 7.6.2 | 7.8.1 | 7.5.3 | 7.7.2 | 6.9.2 | 7.8.2 | 7.5.4 | 7.8.22 | 7.7.21 | 7.3.5 | 7.5.5 | 7.3.6 | 7.8.23
  • ios_xr< 7.9.1

1 vendor · 2 products

References

2 links