Sep 2026: HEVC Video Extensions Remote Code Execution Vulnerability
CVE-2026-58599 Published on September 8, 2026
HEVC Video Extensions Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to execute code locally.
Vulnerability Analysis
Weakness Type
Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
Products Associated with CVE-2026-58599
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Affected Versions
Microsoft HEVC Video Extensions:- Version 1.0.0 and below 2.4.87.0 is affected.
- Version 2.0.0.0 and below 2.4.85.0 is affected.
- Version 2.0.0.0 and below 2.4.86.0 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.