PT-2025-37064 · Cisco · Cisco Ios Xr

Published 2025-09-10 · Updated 2025-09-12 · CVE-2025-20248

Positive Technologies (AI Summary)

CVSS v2.0

6.2

Medium

Base vector

AV:L/AC:L/Au:S/C:C/I:C/A:N

Name of the Vulnerable Software and Affected Versions: Cisco IOS XR Software (affected versions not specified)

Description: A flaw in the installation process of Cisco IOS XR Software may allow an authenticated, local attacker to bypass the image signature verification and load unsigned software on a device. The vulnerability stems from incomplete validation of files during the installation of an .iso file. An attacker could modify the contents of the .iso image and then install and activate it on the device, potentially loading an unsigned file as part of the image activation process. To exploit this, the attacker must have root-system privileges on the affected device.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

Related Identifiers

BDU:2025-11353

CVE-2025-20248

Affected Products

Cisco Ios Xr

References · 5

• https://bdu.fstec.ru/vul/2025-11353 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xrsig-UY4zRUCG · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-20248 · Security Note
• https://twitter.com/CVEnew/status/1965920230179299529 · Twitter Post
• https://twitter.com/TweetThreatNews/status/1966634135063040291 · Twitter Post