How severe is CVE-2025-11156?

CVE-2025-11156 has a CVSS 4.0 base score of 5.9, rated medium severity.

Is CVE-2025-11156 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-11156?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-11156 have an EU (EUVD) identifier?

Yes. CVE-2025-11156 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199877.

When was CVE-2025-11156 published?

CVE-2025-11156 was published on 2025-11-28 and last updated on 2026-06-17.

CVE-2025-11156

CVE-2025-11156 is a medium-severity vulnerability with a CVSS 4.0 base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Medium (CVSS 4.0 base score 5.9)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-199877
Weakness: CWE-476
Published: 2025-11-28
Last modified: 2026-06-17

Description

Netskope was notified about a potential gap in its agent (NS Client) on Windows systems. If this gap is successfully exploited, a local, authenticated user with Administrator privileges can improperly load the driver as a generic kernel service. This triggers the flaw, causing a system crash (Blue-Screen-of-Death) and resulting in a Denial of Service (DoS) for the affected machine.

Frequently asked questions

What is CVE-2025-11156?: Netskope was notified about a potential gap in its agent (NS Client) on Windows systems. If this gap is successfully exploited, a local, authenticated user with Administrator privileges can improperly load the driver as a generic kernel service. This triggers the flaw, causing a system crash (Blue-Screen-of-Death) and resulting in a Denial of Service (DoS) for the affected machine.
How severe is CVE-2025-11156?: CVE-2025-11156 has a CVSS 4.0 base score of 5.9, rated medium severity.
Is CVE-2025-11156 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-11156?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-11156 have an EU (EUVD) identifier?: Yes. CVE-2025-11156 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199877.
When was CVE-2025-11156 published?: CVE-2025-11156 was published on 2025-11-28 and last updated on 2026-06-17.

References

https://www.netskope.com/company/security-compliance-and-assurance/security-advisories-and-disclosures/netskope-security-advisory-nskpsa-2025-005

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