THREATPORT/VULNERABILITY/CVE-2025-12420
CRITICAL SEVERITY

CVE-2025-12420

Now Assist Ai Agents vulnerability

CVSS
9.8
EPSS
45.5%
EPSS pct
99th
Exploited
No known
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 vendor
Servicenow
Affected product
Now Assist Ai Agents
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-250 — Execution with Unnecessary Privileges
Published
2026-01-12

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 45.5% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it among the most exploited CVEs currently tracked.

Check your external exposure to CVE-2025-12420

  • Confirm whether Servicenow Now Assist Ai Agents is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2025-12420.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2025-12420

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2025-12420 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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