CVE-2025-20248: Auth Local Byp IOS XR Img Sig Verif
CVE-2025-20248 Published on September 10, 2025
Cisco IOS XR Software Image Verification Bypass Vulnerability
A vulnerability in the installation process of Cisco IOS XR Software could allow an authenticated, local attacker to bypass Cisco IOS XR Software image signature verification and load unsigned 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 incomplete validation of files during the installation of an .iso file. An attacker could exploit this vulnerability by modifying contents of the .iso image and then installing and activating it on the device. A successful exploit could allow the attacker to load an unsigned file as part of the image activation process.
Vulnerability Analysis
CVE-2025-20248 is exploitable with local system access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and no impact on availability.
Weakness Type
Improper Verification of Cryptographic Signature
The software does not verify, or incorrectly verifies, the cryptographic signature for data.
Products Associated with CVE-2025-20248
You can be notified by email with stack.watch whenever vulnerabilities like CVE-2025-20248 are published in Cisco Ios Xr:
Affected Versions
Cisco IOS XR Software:- Version 6.5.3 is affected.
- Version 6.5.29 is affected.
- Version 6.5.1 is affected.
- Version 6.6.1 is affected.
- Version 6.5.2 is affected.
- Version 6.5.92 is affected.
- Version 6.5.15 is affected.
- Version 6.6.2 is affected.
- Version 7.0.1 is affected.
- Version 6.6.25 is affected.
- Version 6.5.26 is affected.
- Version 6.6.11 is affected.
- Version 6.5.25 is affected.
- Version 6.5.28 is affected.
- Version 6.5.93 is affected.
- Version 6.6.12 is affected.
- Version 6.5.90 is affected.
- Version 7.0.0 is affected.
- Version 7.1.1 is affected.
- Version 7.0.90 is affected.
- Version 6.6.3 is affected.
- Version 6.7.1 is affected.
- Version 7.0.2 is affected.
- Version 7.1.15 is affected.
- Version 7.2.0 is affected.
- Version 7.2.1 is affected.
- Version 7.1.2 is affected.
- Version 6.7.2 is affected.
- Version 7.1.25 is affected.
- Version 6.6.4 is affected.
- Version 7.3.1 is affected.
- Version 7.1.3 is affected.
- Version 6.7.3 is affected.
- Version 7.4.1 is affected.
- Version 7.2.2 is affected.
- Version 6.5.31 is affected.
- Version 6.8.1 is affected.
- Version 7.4.15 is affected.
- Version 6.5.32 is affected.
- Version 7.3.2 is affected.
- Version 7.5.1 is affected.
- Version 7.4.16 is affected.
- Version 7.3.27 is affected.
- Version 7.6.1 is affected.
- Version 7.5.2 is affected.
- Version 7.6.15 is affected.
- Version 7.3.3 is affected.
- Version 7.7.1 is affected.
- Version 6.8.2 is affected.
- Version 7.3.4 is affected.
- Version 7.4.2 is affected.
- Version 6.7.35 is affected.
- Version 6.9.1 is affected.
- Version 7.6.2 is affected.
- Version 7.8.1 is affected.
- Version 7.5.3 is affected.
- Version 7.7.2 is affected.
- Version 6.9.2 is affected.
- Version 7.9.1 is affected.
- Version 7.8.2 is affected.
- Version 7.5.4 is affected.
- Version 6.5.33 is affected.
- Version 7.8.22 is affected.
- Version 7.10.1 is affected.
- Version 7.7.21 is affected.
- Version 7.9.2 is affected.
- Version 7.3.5 is affected.
- Version 7.5.5 is affected.
- Version 7.11.1 is affected.
- Version 7.9.21 is affected.
- Version 7.10.2 is affected.
- Version 7.6.3 is affected.
- Version 24.1.1 is affected.
- Version 7.3.6 is affected.
- Version 7.11.2 is affected.
- Version 24.2.1 is affected.
- Version 24.1.2 is affected.
- Version 24.2.11 is affected.
- Version 24.3.1 is affected.
- Version 24.4.1 is affected.
- Version 24.2.2 is affected.
- Version 7.8.23 is affected.
- Version 7.11.21 is affected.
- Version 24.2.20 is affected.
- Version 24.3.2 is affected.
- Version 24.4.10 is affected.
- Version 6.5.35 is affected.
- Version 24.4.15 is affected.
- Version 6.5.351 is affected.
- Version 6.5.352 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.