Critical severity9.8NVD Advisory· Published Jan 12, 2026· Updated Jun 17, 2026
CVE-2025-12420
CVE-2025-12420
Description
A vulnerability has been identified in the ServiceNow AI Platform that could enable an unauthenticated user to impersonate another user and perform the operations that the impersonated user is entitled to perform.
ServiceNow has addressed this vulnerability by deploying a relevant security update to hosted instances in October 2025. Security updates have also been provided to ServiceNow self-hosted customers, partners, and hosted customers with unique configurations. Additionally, the vulnerability is addressed in the listed Store App versions. We recommend that customers promptly apply an appropriate security update or upgrade if they have not already done so.
Affected products
5cpe:2.3:a:servicenow:now_assist_ai_agents:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:servicenow:now_assist_ai_agents:*:*:*:*:*:*:*:*range: <5.1.18
- (no CPE)range: 5.0.26
Patches
Vulnerability mechanics
References
1- support.servicenow.com/kbnvdVendor Advisory
News mentions
1- This month in security with Tony Anscombe – January 2026 editionESET WeLiveSecurity · Jan 30, 2026