CVE-2025-20177

Cisco IOS XR Software Image Verification Bypass Vulnerability

MEDIUM

6.7

CVSS Score

Published: March 12, 2025 at 04:13 PM UTC

Updated: June 17, 2026 at 08:40 AM UTC

60 products affected across 1 vendorIOS Xr82018202

Using Cisco IOS XR Software by Cisco?

Get instant alerts when new vulnerabilities affect Cisco IOS XR Software - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

MEDIUM6.7

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

A vulnerability in the boot process of Cisco IOS XR Software could allow an authenticated, local attacker to bypass Cisco IOS XR image signature verification and load unverified 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 in the boot verification process. An attacker could exploit this vulnerability by manipulating the system configuration options to bypass some of the integrity checks that are performed during the boot process. A successful exploit could allow the attacker to control the boot configuration, which could enable them to bypass the requirement to run Cisco-signed images or alter the security properties of the running system. Note: Because exploitation of this vulnerability could result in the attacker bypassing Cisco image verification, Cisco has raised the Security Impact Rating (SIR) of this advisory from Medium to High.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

IOS Xr · Cisco

95%

v < 7.11.2124.2 ≤ v < 24.2.224.3 ≤ v < 24.3.224.1.1 24.1.2 24.2.1 24.2.11 24.3.1 24.4 6.7.1 6.7.2 6.7.3 6.7.35 6.7.4 6.8.1 6.8.2 6.9.1 6.9.2 7.0.0 7.0.1 7.0.11 7.0.12 7.0.14 7.0.2 7.0.90 7.1.1 7.1.15 7.1.2 7.1.25 7.1.3 7.10.1 7.10.2 7.11.1 7.11.2 7.2.0 7.2.1 7.2.12 7.2.2 7.3.1 7.3.15 7.3.16 7.3.2 7.3.27 7.3.3 7.3.4 7.3.5 7.3.6 7.4.1 7.4.15 7.4.16 7.4.2 7.5.1 7.5.12 7.5.2 7.5.3 7.5.4 7.5.5 7.6.1 7.6.15 7.6.2 7.6.3 7.7.1 7.7.2 7.7.21 7.8.1 7.8.2 7.8.22 7.8.23 7.9.1 7.9.2 7.9.21

Affected range stops below 24.2.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 24.3.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.11.21, so it looks safe — our inference, not a vendor statement

cisco-8011-4g24y4h-i (environment) · cisco-8101-32fh (environment) · cisco-8101-32fh-o (environment) · cisco-8101-32h-o (environment) · cisco-8102-28fh-dpu-o (environment) · cisco-8102-64h (environment) · cisco-8102-64h-o (environment) · cisco-8111-32eh-o (environment) · cisco-8122-64eh-o (environment) · cisco-8122-64ehf-o (environment) · cisco-8201 (environment) · cisco-8201-24h8fh (environment) · cisco-8201-32fh (environment) · cisco-8201-32fh-o (environment) · cisco-8202 (environment) · cisco-8202-32fh-m (environment) · cisco-8212-48fh-m (environment) · cisco-8404 (environment) · cisco-8501-sys-mt (environment) · cisco-8608 (environment) · cisco-8700 (environment) · cisco-8711-32fh-m (environment) · cisco-8712-mod-m (environment) · cisco-8804 (environment) · cisco-8808 (environment) · cisco-8812 (environment) · cisco-8818 (environment) · cisco-ncs-1010 (environment) · cisco-ncs-1014 (environment) · cisco-ncs-540-12z20g-sys-a (environment) · cisco-ncs-540-12z20g-sys-d (environment) · cisco-ncs-540-24q2c2dd-sys (environment) · cisco-ncs-540-24q8l2dd-sys (environment) · cisco-ncs-540-24z8q2c-sys (environment) · cisco-ncs-540-28z4c-sys-a (environment) · cisco-ncs-540-28z4c-sys-d (environment) · cisco-ncs-540-6z14s-sys-d (environment) · cisco-ncs-540-6z18g-sys-a (environment) · cisco-ncs-540-6z18g-sys-d (environment) · cisco-ncs-540-acc-sys (environment) · cisco-ncs-540-fh-agg (environment) · cisco-ncs-540-fh-csr-sys (environment) · cisco-ncs-540x-12z16g-sys-a (environment) · cisco-ncs-540x-12z16g-sys-d (environment) · cisco-ncs-540x-16z4g8q2c-a (environment) · cisco-ncs-540x-16z4g8q2c-d (environment) · cisco-ncs-540x-16z8q2c-d (environment) · cisco-ncs-540x-4z14g2q-a (environment) · cisco-ncs-540x-4z14g2q-d (environment) · cisco-ncs-540x-6z18g-sys-a (environment) · cisco-ncs-540x-6z18g-sys-d (environment) · cisco-ncs-540x-8z16g-sys-a (environment) · cisco-ncs-540x-8z16g-sys-d (environment) · cisco-ncs-540x-acc-sys (environment) · cisco-ncs-57b1-5dse-sys (environment) · cisco-ncs-57b1-6d24-sys (environment) · cisco-ncs-57c1-48q6-sys (environment) · cisco-ncs-57c3-mod-sys (environment) · cisco-ncs-57d2-18dd-sys (environment)

8011-4G24Y4H-I · Ciscodevice

80%

All versions

8101-32Fh · Ciscodevice

80%

All versions

8101-32Fh-O · Ciscodevice

80%

All versions

8101-32H-O · Ciscodevice

80%

All versions