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CVE-2026-40399

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Moole Vulnerability Database

Find real vulnerabilities before they ship

Vulnerability Database › CVE-2026-40399

High

CVE-2026-40399

Stack-based buffer overflow in Windows TCP/IP allows an authorized attacker to elevate privileges locally.

VectorLOCAL

PublishedMay 12, 2026, 18:17

Published Bysecure@microsoft.com

Base Score

Score7.8

Affected Versions

No affected versions found.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40399

Weakness Type

CWE-121

CVSS Metrics

Base Score

7.8

Vector String

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Base SeverityHigh

Version

3.1

Attack Vector (AV)

LOCAL