Vulnerability · Published Sep 8, 2026 · Assigned by microsoft
CVE-2026-58599HEVC Video Extensions Remote Code Execution Vulnerability
High 7.8
In plain English
A high-severity heap buffer overflow in HEVC Video Extensions from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.5%top 59.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to execute code locally.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | HEVC Video Extensions | 1.0.0 – before 2.4.87.0 |
| Microsoft | HEVC Video Extensions for Licensed Applications | 2.0.0.0 – before 2.4.85.0 |
| Microsoft | HEVC Video Extensions from Device Manufacturer | 2.0.0.0 – before 2.4.86.0 |
Weakness: CWE-122 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- HEVC Video Extensions Remote Code Execution Vulnerability vendor-advisory, patch