CVE-2026-58599
High CVSS 7.8Published 2026-09-08 ยท last changed 2026-09-09
The fix
Microsoft publishes remediation for this across 22 product branches. The fixed build differs per Windows version, so the row that matters is the one matching the machine you are looking at.
| Windows version | Fixed in build | Update | Released |
|---|---|---|---|
| HEVC Video Extensions from Device Manufacturer on Windows 10 Version 1809 for 32-bit Systems | 2.4.86.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows 10 Version 1809 for x64-based Systems | 2.4.86.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for 32-bit Systems | 2.4.86.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for ARM64-based Systems | 2.4.86.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows 10 Version 21H2 for x64-based Systems | 2.4.86.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for 32-bit Systems | 2.4.86.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for ARM64-based Systems | 2.4.86.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows 10 Version 22H2 for x64-based Systems | 2.4.86.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows 11 Version 23H2 for ARM64-based Systems | 2.4.86.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows 11 Version 23H2 for x64-based Systems | 2.4.86.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows 11 Version 24H2 for ARM64-based Systems | 2.4.86.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows 11 Version 24H2 for x64-based Systems | 2.4.86.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows 11 Version 25H2 for ARM64-based Systems | 2.5.25.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows 11 Version 25H2 for x64-based Systems | 2.5.25.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows 11 Version 26H1 for ARM64-based Systems | 2.5.25.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows 11 version 26H1 for x64-based Systems | 2.5.25.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows Server 2019 | 2.4.86.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows Server 2019 (Server Core installation) | 2.4.86.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows Server 2022 | 2.4.86.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows Server 2022 (Server Core installation) | 2.4.86.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows Server 2025 | 2.4.86.0 | configuration change | 2026-09-20 |
| HEVC Video Extensions from Device Manufacturer on Windows Server 2025 (Server Core installation) | 2.4.86.0 | configuration change | 2026-09-20 |
Having the KB is not the same as knowing whether a machine has it. Windows updates supersede each other, so the update you installed often covers a fix that shipped in an earlier one. Paste your build into the patch checker and it walks that chain for you.
What it is
Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to execute code locally.
Sources
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H