Description
Missing authentication for critical function in Windows Health and Optimized Experiences Service allows an authorized attacker to elevate privileges locally.
Affected products
microsoft: windows 11 24h2; microsoft: windows 11 25h2; microsoft: windows 11 26h1; microsoft: windows 11 26h2
References1
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85884 PatchVendor Advisory
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 38 · as of 11 November 2026
- CWE
- CWE-306
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.