SB2025091125 - Improper Verification of Cryptographic Signature in Cisco IOS XR
Published: September 11, 2025
Security Bulletin ID
SB2025091125
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2025-20248)
CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
The vulnerability allows a local user to compromise the target system.
The vulnerability exists due to incomplete validation of files during the installation of an .iso file. A local administrator can load an unsigned file as part of the image activation process.
Remediation
Install update from vendor's website.