Description
Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to elevate privileges locally.
Affected products
microsoft: hevc video extensions; microsoft: hevc video extensions for licensed applications; microsoft: hevc video extensions from device manufacturer; microsoft: windows 10 1809; microsoft: windows 10 21h2; microsoft: windows 10 22h2; microsoft: windows 11 22h2; microsoft: windows 11 23h2; microsoft: windows 11 24h2; microsoft: windows server 2019; microsoft: windows server 2022; microsoft: windows server 2025; microsoft: windows 11 25h2; microsoft: windows 11 26h1
References1
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58600 PatchVendor Advisory
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 40 · as of 3 November 2026
- CWE
- CWE-122
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.