What is CVE-2025-20143?

CVE-2025-20143 is a medium-severity vulnerability in Cisco Ios Xr Software, classified under Improper Verification of Cryptographic Signature. CVSS score: 6.7/10. Published 2025-03-12.

How severe is CVE-2025-20143?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Vulnerability in Cisco Ios Xr Software

CVE-2025-20143

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 vuln…

EPSS: 0.001 (1.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Cisco Ios Xr Software — versions 6.5.3, 6.5.2, 6.5.92
Cisco Ios_xr

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

psirt@cisco.com (Vendor Advisory)
psirt@cisco.com (Technical Description)

Frequently asked questions

What is CVE-2025-20143?: CVE-2025-20143 is a medium-severity vulnerability in Cisco Ios Xr Software, classified under Improper Verification of Cryptographic Signature. CVSS score: 6.7/10. Published 2025-03-12.
How severe is CVE-2025-20143?: Medium severity. CVSS v3 base score is 6.7 out of 10.