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.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Cisco
  • Ios Xr Software

No data.

No data.

References
Link Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xrsig-UY4zRUCG cve-icon cve-icon
History

Thu, 11 Sep 2025 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Cisco
Cisco ios Xr Software
Vendors & Products Cisco
Cisco ios Xr Software

Wed, 10 Sep 2025 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 10 Sep 2025 16:15:00 +0000

Type Values Removed Values Added
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.
Title Cisco IOS XR Software Image Verification Bypass Vulnerability
Weaknesses CWE-347
References
Metrics cvssV3_1

{'score': 6, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published: 2025-09-10T16:06:49.860Z

Updated: 2025-09-11T03:56:26.379Z

Reserved: 2024-10-10T19:15:13.238Z

Link: CVE-2025-20248

cve-icon Vulnrichment

Updated: 2025-09-10T18:04:42.836Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-09-10T16:15:36.117

Modified: 2025-09-11T17:14:10.147

Link: CVE-2025-20248

cve-icon Redhat

No data.