Microsoft Security Response CenterCVE-2026-58600

HEVC Video Extensions Elevation of Privilege Vulnerability

Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to elevate privileges locally.

Read the vendor bulletin Get alerts for HEVC Video Extensions

7.8CVSS out of 10High severity

Scope

What the vendor says is affected

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 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 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 x64-based 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 32-bit Systems
HEVC Video Extensions from Device Manufacturer on Windows Server 2025 (Server Core installation)
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 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 Server 2025
HEVC Video Extensions from Device Manufacturer on Windows 11 version 26H1 for x64-based Systems
HEVC Video Extensions from Device Manufacturer on Windows 11 Version 26H1 for ARM64-based Systems

Versions the vendor lists as fixed

2.4.87.0
2.4.85.0
2.4.86.0
2.5.25.0

Next step

What the vendor recommends

Update Information

Review the complete instructions on the vendor's site

Timeline

When this advisory changed

Sep 8, 2026 at 7:00 AM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Sep 8, 2026 at 7:15 PM UTC
Added to SecurityAlert
We collected the advisory from the official source.
Sep 13, 2026 at 2:40 AM UTC
Confirmed at the source
Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-58600View CVSS, KEV, EPSS, and threat context

Source

Start with the vendor's bulletin

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Vendor: Microsoft Security Response Center
Advisory ID: CVE-2026-58600
Last source check: Sep 13, 2026 at 2:40 AM UTC

Open the official bulletin How SecurityAlert builds this record

Your environment

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What the vendor says is affected

Versions the vendor lists as fixed

What the vendor recommends

When this advisory changed

CVEs named in this advisory

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