What is CVE-2026-58599?

CVE-2026-58599 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. HEVC Video Extensions Remote Code Execution Vulnerability

Which CVE IDs does CVE-2026-58599 cover?

CVE-2026-58599 covers the following CVE IDs: CVE-2026-58599. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-58599?

CVE-2026-58599 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-58599?

CVE-2026-58599 affects 24 products, including: 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; and others — see the full list on the advisory page.

CVE-2026-58599CriticalCVSS 7.8

HEVC Video Extensions Remote Code Execution Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

September 11, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-58599 →

📋 Description

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

🎯 Affected products24

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)

✅ Remediation

KBUpdate Information (Security Update) — fixed build 2.4.87.0 KBUpdate Information (Security Update) — fixed build 2.4.85.0 KBUpdate Information (Security Update) — fixed build 2.4.86.0 KBUpdate Information (Security Update) — fixed build 2.5.25.0

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products24

✅ Remediation

🔗 References (4)