What’s Vulnerable › Vulnerabilities
CVE-2026-58599: HEVC Video Extensions Remote Code Execution Vulnerability
- Severity: high (CVSS 7.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-08 · updated 2026-10-31
- Weakness: CWE-122
Description
Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to execute code locally.
Affected products
- Microsoft HEVC Video Extensions: before 2.4.87.0 — fixed in 2.4.87.0
- Microsoft HEVC Video Extensions for Licensed Applications: before 2.4.85.0 — fixed in 2.4.85.0
- Microsoft HEVC Video Extensions from Device Manufacturer: before 2.4.86.0; before 2.5.25.0 — fixed in 2.4.86.0, 2.5.25.0
- Microsoft HEVC Video Extensions: from 1.0.0 before 2.4.87.0 — fixed in 2.4.87.0
- Microsoft HEVC Video Extensions for Licensed Applications: from 2.0.0.0 before 2.4.85.0 — fixed in 2.4.85.0
- Microsoft HEVC Video Extensions from Device Manufacturer: from 2.0.0.0 before 2.4.86.0 — fixed in 2.4.86.0
How to fix
Upgrade to a fixed version: Microsoft HEVC Video Extensions 2.4.87.0; Microsoft HEVC Video Extensions for Licensed Applications 2.4.85.0; Microsoft HEVC Video Extensions from Device Manufacturer 2.4.86.0, 2.5.25.0; Microsoft HEVC Video Extensions 2.4.87.0; Microsoft HEVC Video Extensions for Licensed Applications 2.4.85.0; Microsoft HEVC Video Extensions from Device Manufacturer 2.4.86.0. Check the vendor advisory for mitigations.
References
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