CVE-2026-50440: Microsoft Windows 11 Version 24H2

Windows Audio Service Elevation of Privilege Vulnerability

CVSS 7.8 HighEPSS 0.0021 · 11th percentile

Published by the CVE Program (CNA: microsoft) at 14 Jul 2026, 17:06 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Microsoft	Windows 11 Version 24H2	affected 10.0.26100.0 to before 10.0.26100.8875 custom
Microsoft	Windows 11 Version 25H2	affected 10.0.26200.0 to before 10.0.26200.8875 custom
Microsoft	Windows 11 version 26H1	affected 10.0.28000.0 to before 10.0.28000.2525 custom

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Microsoft Windows 11 Version 24H2 (10.0.26100.0 before 10.0.26100.8875), Version 25H2 (10.0.26200.0 before 10.0.26200.8875), and version 26H1 (10.0.28000.0 before 10.0.28000.2525) contain a race condition in the Windows Audio Service. A local attacker with an authorized account can exploit it to gain elevated privileges. Upgrade to the fixed versions listed for your release.

Written 13 Nov 2026.

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.8	High	3.1	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	CNA (microsoft)

CISA KEV Not listed.
EPSS 0.0021, the 11th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

14 Jul 2026, 17:06 UTC Confirmed by the CVE List

Sources

References from the CNA

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50440 vendor-advisorypatch

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.