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CVE-2026-40402NVD

Vulnerability Summary

Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.

Severity Level

CRITICAL(9.3)

Published Date

May 12, 2026

Last Modified

May 15, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.06%Probability

Root Weakness (CWE)

CWE-416: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CVSS v3.1 Base Metrics

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeChanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

External References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40402

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