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Vulnerabilities

Vulnerability · CVE-2025-12420

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 imperson

Published Jan 12, 2026 · catalog updated Feb 26, 2026 · Servicenow Now Assist AI Agents

Last checked Nov 5, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2025-12420 is not in CISA KEV. FIRST estimates a 53.19% chance of exploitation in the next 30 days. Check whether you run Servicenow Now Assist AI Agents.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
53.19%
Remediation
Vendor / distro source
Affected products
vendor Servicenow Now Assist AI Agents 5.0.26 ≤5.2.18

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 app

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Servicenow Now Assist AI Agents 5.0.26 ≤5.2.185.0.26 ≤5.2.18

How to fix CVE-2025-12420

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-12420 is not in CISA KEV. FIRST estimates a 53.19% chance of exploitation in the next 30 days. Check whether you run Servicenow Now Assist AI Agents.

Which versions are affected?

Compare what you have installed with Servicenow Now Assist AI Agents 5.0.26 ≤5.2.18 5.0.26 ≤5.2.18. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 53.19%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 12, 2026 · EUVD

    Detected

    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-hoste

  2. Feb 26, 2026 · EUVD

    Updated

    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-hoste

Sources

  • CVE.orgVulnerability recordCVE-2025-12420

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-12420

    30-day exploitation probability 53.19%

    first.org
  • EUVDVulnerability recordEUVD-2025-206275

    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 relevan

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 5, 2026
  • CVE.orgOct 30, 2026
  • EUVDOct 30, 2026