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.
Metrics
Affected Vendors & Products
References
History
Wed, 06 Aug 2025 17:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
First Time appeared |
Cisco 8011-4g24y4h-i
Cisco 8101-32fh Cisco 8101-32fh-o Cisco 8101-32h-o Cisco 8102-28fh-dpu-o Cisco 8102-64h Cisco 8102-64h-o Cisco 8111-32eh-o Cisco 8122-64eh-o Cisco 8122-64ehf-o Cisco 8201 Cisco 8201-24h8fh Cisco 8201-32fh Cisco 8201-32fh-o Cisco 8202 Cisco 8202-32fh-m Cisco 8212-48fh-m Cisco 8404 Cisco 8501-sys-mt Cisco 8608 Cisco 8700 Cisco 8711-32fh-m Cisco 8712-mod-m Cisco 8804 Cisco 8808 Cisco 8812 Cisco 8818 Cisco ios Xr Cisco ncs 1010 Cisco ncs 1014 Cisco ncs 540-12z20g-sys-a Cisco ncs 540-12z20g-sys-d Cisco ncs 540-24q2c2dd-sys Cisco ncs 540-24q8l2dd-sys Cisco ncs 540-24z8q2c-sys Cisco ncs 540-28z4c-sys-a Cisco ncs 540-28z4c-sys-d Cisco ncs 540-6z14s-sys-d Cisco ncs 540-6z18g-sys-a Cisco ncs 540-6z18g-sys-d Cisco ncs 540-acc-sys Cisco ncs 540-fh-agg Cisco ncs 540-fh-csr-sys Cisco ncs 540x-12z16g-sys-a Cisco ncs 540x-12z16g-sys-d Cisco ncs 540x-16z4g8q2c-a Cisco ncs 540x-16z4g8q2c-d Cisco ncs 540x-16z8q2c-d Cisco ncs 540x-4z14g2q-a Cisco ncs 540x-4z14g2q-d Cisco ncs 540x-6z18g-sys-a Cisco ncs 540x-6z18g-sys-d Cisco ncs 540x-8z16g-sys-a Cisco ncs 540x-8z16g-sys-d Cisco ncs 540x-acc-sys Cisco ncs 57b1-5dse-sys Cisco ncs 57b1-6d24-sys Cisco ncs 57c1-48q6-sys Cisco ncs 57c3-mod-sys Cisco ncs 57d2-18dd-sys |
|
CPEs | cpe:2.3:h:cisco:8011-4g24y4h-i:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8101-32fh-o:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8101-32fh:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8101-32h-o:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8102-28fh-dpu-o:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8102-64h-o:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8102-64h:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8111-32eh-o:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8122-64eh-o:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8122-64ehf-o:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8201-24h8fh:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8201-32fh-o:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8201-32fh:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8201:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8202-32fh-m:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8202:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8212-48fh-m:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8404:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8501-sys-mt:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8608:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8700:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8711-32fh-m:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8712-mod-m:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8804:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8808:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8812:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8818:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_1010:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_1014:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540-12z20g-sys-a:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540-12z20g-sys-d:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540-24q2c2dd-sys:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540-24q8l2dd-sys:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540-24z8q2c-sys:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540-28z4c-sys-a:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540-28z4c-sys-d:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540-6z14s-sys-d:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540-6z18g-sys-a:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540-6z18g-sys-d:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540-acc-sys:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540-fh-agg:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540-fh-csr-sys:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540x-12z16g-sys-a:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540x-12z16g-sys-d:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540x-16z4g8q2c-a:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540x-16z4g8q2c-d:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540x-16z8q2c-d:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540x-4z14g2q-a:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540x-4z14g2q-d:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540x-6z18g-sys-a:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540x-6z18g-sys-d:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540x-8z16g-sys-a:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540x-8z16g-sys-d:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_540x-acc-sys:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_57b1-5dse-sys:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_57b1-6d24-sys:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_57c1-48q6-sys:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_57c3-mod-sys:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:ncs_57d2-18dd-sys:-:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios_xr:24.4:*:*:*:*:*:*:* |
|
Vendors & Products |
Cisco 8011-4g24y4h-i
Cisco 8101-32fh Cisco 8101-32fh-o Cisco 8101-32h-o Cisco 8102-28fh-dpu-o Cisco 8102-64h Cisco 8102-64h-o Cisco 8111-32eh-o Cisco 8122-64eh-o Cisco 8122-64ehf-o Cisco 8201 Cisco 8201-24h8fh Cisco 8201-32fh Cisco 8201-32fh-o Cisco 8202 Cisco 8202-32fh-m Cisco 8212-48fh-m Cisco 8404 Cisco 8501-sys-mt Cisco 8608 Cisco 8700 Cisco 8711-32fh-m Cisco 8712-mod-m Cisco 8804 Cisco 8808 Cisco 8812 Cisco 8818 Cisco ios Xr Cisco ncs 1010 Cisco ncs 1014 Cisco ncs 540-12z20g-sys-a Cisco ncs 540-12z20g-sys-d Cisco ncs 540-24q2c2dd-sys Cisco ncs 540-24q8l2dd-sys Cisco ncs 540-24z8q2c-sys Cisco ncs 540-28z4c-sys-a Cisco ncs 540-28z4c-sys-d Cisco ncs 540-6z14s-sys-d Cisco ncs 540-6z18g-sys-a Cisco ncs 540-6z18g-sys-d Cisco ncs 540-acc-sys Cisco ncs 540-fh-agg Cisco ncs 540-fh-csr-sys Cisco ncs 540x-12z16g-sys-a Cisco ncs 540x-12z16g-sys-d Cisco ncs 540x-16z4g8q2c-a Cisco ncs 540x-16z4g8q2c-d Cisco ncs 540x-16z8q2c-d Cisco ncs 540x-4z14g2q-a Cisco ncs 540x-4z14g2q-d Cisco ncs 540x-6z18g-sys-a Cisco ncs 540x-6z18g-sys-d Cisco ncs 540x-8z16g-sys-a Cisco ncs 540x-8z16g-sys-d Cisco ncs 540x-acc-sys Cisco ncs 57b1-5dse-sys Cisco ncs 57b1-6d24-sys Cisco ncs 57c1-48q6-sys Cisco ncs 57c3-mod-sys Cisco ncs 57d2-18dd-sys |
Sat, 12 Jul 2025 13:45:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Metrics |
epss
|
epss
|
Fri, 14 Mar 2025 16:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Metrics |
ssvc
|
Wed, 12 Mar 2025 16:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
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. | |
Title | Cisco IOS XR Software Image Verification Bypass Vulnerability | |
Weaknesses | CWE-274 | |
References |
| |
Metrics |
cvssV3_1
|

Status: PUBLISHED
Assigner: cisco
Published:
Updated: 2025-03-14T15:31:19.971Z
Reserved: 2024-10-10T19:15:13.220Z
Link: CVE-2025-20177

Updated: 2025-03-14T15:31:16.972Z

Status : Analyzed
Published: 2025-03-12T16:15:22.347
Modified: 2025-08-06T17:04:34.603
Link: CVE-2025-20177

No data.