CVE-2026-58600: CWE-122: Heap-based Buffer Overflow in Microsoft HEVC Video Extensions
Description
CVE-2026-58600 is a heap-based buffer overflow vulnerability in the Microsoft HEVC Video Extensions codec library. It allows a local unauthorized attacker to elevate privileges on the affected system. The vulnerability has a high severity with a CVSS score of 7.8. Microsoft has released an official fix to address this issue.
CVSS v3.1
Score 7.8high
Affected software
Microsoft
HEVC Video Extensions
Microsoft
HEVC Video Extensions for Licensed Applications
Microsoft
HEVC Video Extensions from Device Manufacturer
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-58600) involves a heap-based buffer overflow in the Microsoft Windows Codecs Library component used by the HEVC Video Extensions. Exploitation requires local access and user interaction but can lead to elevation of privileges. The flaw affects multiple versions of the HEVC Video Extensions prior to 2.4.85.0 and 2.4.87.0, depending on the version branch. Microsoft has published an official security update to remediate this issue.
Potential Impact
Successful exploitation allows an unauthorized local attacker to elevate privileges, potentially gaining higher system rights. This could enable the attacker to execute code with elevated permissions, compromising system integrity and confidentiality.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for the HEVC Video Extensions as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58600. No additional mitigation steps are required beyond applying the official patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-01T18:03:43.124Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58600","vendor":"Microsoft"}]
Threat ID: 6aa044c5acd9273b49fa5fd7
Added to database: 09/08/2026, 17:24:21 UTC
Last enriched: 10/16/2026, 20:48:35 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 24
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