Description

Time-of-check time-of-use (toctou) race condition in Windows Installer allows an authorized attacker to elevate privileges locally.

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References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20816

Vendor Advisory

Weaknesses

[email protected]

Primary
CWE-367

CVSS impact metrics

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

7.8 · High

Information

Source identifier

[email protected]

Vulnerability status

Analyzed

Published

2026-01-13T18:16:08.437Z

33 hours ago

Last modified

2026-01-14T20:29:02.597Z

7 hours ago