CVE-2025-20248
Cisco IOS XR Software Image Verification Bypass Vulnerability
Description
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.
Weakness: CWE-347
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco IOS XR Software | Routing & Switching | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco IOS XR Software
Vendor advisory
Cisco IOS XR Software Image Verification Bypass Vulnerability
Cisco’s rating: High (advisory CVSS 6.0) · Published Sep 10, 2025
Bug ID: CSCwm03455
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from