How severe is CVE-2025-12420?

CVE-2025-12420 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-12420 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 45% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-12420?

CVE-2025-12420 primarily affects Servicenow Now Assist Ai Agents. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-12420?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-12420 have an EU (EUVD) identifier?

Yes. CVE-2025-12420 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206275.

When was CVE-2025-12420 published?

CVE-2025-12420 was published on 2026-01-12 and last updated on 2026-06-17.

CVE-2025-12420

CVE-2025-12420 is a critical-severity vulnerability in Servicenow Now Assist Ai Agents with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 45% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-250.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 45% (99th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-206275
Weakness: CWE-250
Affected product: Servicenow Now Assist Ai Agents
Published: 2026-01-12
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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 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.
How severe is CVE-2025-12420?: CVE-2025-12420 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-12420 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 45% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-12420?: CVE-2025-12420 primarily affects Servicenow Now Assist Ai Agents. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-12420?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-12420 have an EU (EUVD) identifier?: Yes. CVE-2025-12420 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206275.
When was CVE-2025-12420 published?: CVE-2025-12420 was published on 2026-01-12 and last updated on 2026-06-17.

References

https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB2587329

Affected products (2)

cpe:2.3:a:servicenow:now_assist_ai_agents:*:*:*:*:*:*:*:*
cpe:2.3:a:servicenow:virtual_agent_api:*:*:*:*:*:*:*:*

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