CVE-2026-58600Important
HEVC Video Extensions Elevation of Privilege Vulnerability
Assessment
Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to elevate privileges locally.
- Severity
- Important
- CVSS base score
- 7.8CVSS:3.1/
AV:L/ AC:L/ PR:N/ UI:R/ S:U/ C:H/ I:H/ A:H/ E:U/ RL:O/ RC:C - Impact
- Elevation of Privilege
- EPSS, next 30 days
- 0.5%Higher than 38.7% of scored CVEs · FIRST model run 26 Sep 2026 · about EPSS
- Exploitability
- Exploitation Less Likely
- Publicly disclosed
- No
- Customer action
- Required: apply the update
- Component
- Microsoft Windows Codecs Library
- Weakness
- CWE-122: Heap-based Buffer Overflow
- Issued by
- Microsoft
- Published
- 8 Sep 2026 · September 2026
- Last revised
- 8 Sep 2026
Updates that fix it
0 KBsNo KB listed
MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.
Affected products
Windows24 affected products
- HEVC Video Extensions
- HEVC Video Extensions for Licensed Applications
- HEVC Video Extensions from Device Manufacturer on Windows 10 Version 1809 for 32-bit Systems
- HEVC Video Extensions from Device Manufacturer on Windows 10 Version 1809 for x64-based Systems
- HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for 32-bit Systems
- HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for ARM64-based Systems
- HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for x64-based Systems
- HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for 32-bit Systems
- HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for ARM64-based Systems
- HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for x64-based Systems
- HEVC Video Extensions from Device Manufacturer on Windows 11 Version 23H2 for ARM64-based Systems
- HEVC Video Extensions from Device Manufacturer on Windows 11 Version 23H2 for x64-based Systems
- HEVC Video Extensions from Device Manufacturer on Windows 11 Version 24H2 for ARM64-based Systems
- HEVC Video Extensions from Device Manufacturer on Windows 11 Version 24H2 for x64-based Systems
- HEVC Video Extensions from Device Manufacturer on Windows 11 Version 25H2 for ARM64-based Systems
- HEVC Video Extensions from Device Manufacturer on Windows 11 Version 25H2 for x64-based Systems
- HEVC Video Extensions from Device Manufacturer on Windows 11 Version 26H1 for ARM64-based Systems
- HEVC Video Extensions from Device Manufacturer on Windows 11 version 26H1 for x64-based Systems
- HEVC Video Extensions from Device Manufacturer on Windows Server 2019
- HEVC Video Extensions from Device Manufacturer on Windows Server 2019 (Server Core installation)
- HEVC Video Extensions from Device Manufacturer on Windows Server 2022
- HEVC Video Extensions from Device Manufacturer on Windows Server 2022 (Server Core installation)
- HEVC Video Extensions from Device Manufacturer on Windows Server 2025
- HEVC Video Extensions from Device Manufacturer on Windows Server 2025 (Server Core installation)