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.

INFO

Published Date :

2025-03-12T16:13:04.362Z

Last Modified :

2026-02-26T19:09:35.194Z

Source :

cisco
AFFECTED PRODUCTS

The following products are affected by CVE-2025-20177 vulnerability.

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

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-20177.

URL Resource
https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/ cve-icon cve-icon
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xr-verii-bypass-HhPwQRvx cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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