CVE-2025-20248: Cisco IOS XR Software Image Verification Bypass Vulnerability

Published Sep 10, 2025

Updated

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.

Affected Software

1 affected component

Cisco IOS XR Software

Event History

Sep 10, 2025

CVE Published

via MITRE·04:06 PM

Data Sourced

via MITRE·04:06 PM

DescriptionSeverityWeakness

Data Sourced

via NVD·04:15 PM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the severity of CVE-2025-20248?

The severity of CVE-2025-20248 is considered high due to its potential for unauthorized software execution.

How do I fix CVE-2025-20248?

To fix CVE-2025-20248, ensure you apply the latest security patches provided by Cisco for IOS XR Software.

What type of attack does CVE-2025-20248 enable?

CVE-2025-20248 enables an authenticated local attacker to bypass software image signature verification.

Are all versions of Cisco IOS XR Software affected by CVE-2025-20248?

Yes, CVE-2025-20248 affects all versions of Cisco IOS XR Software that are not updated with the latest patches.

Who is at risk from CVE-2025-20248?

Authenticated local users with root privileges are at risk from the exploitation of CVE-2025-20248.