CVE-2026-58600

Analyzed Analyzed - Analysis Complete

Heap Overflow in Windows Codecs Library

Publication date: 2026-09-08

Last updated on: 2026-10-01

Assigner: Microsoft Corporation

Description

Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-08

Last Modified

2026-10-01

Generated

2026-10-19

AI Q&A

2026-09-09

EPSS Evaluated

2026-10-18

NVD

CVE-2026-58600

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	hevc_video_extensions	to 2.4.87.0 (exc)
microsoft	hevc_video_extensions_for_licensed_applications	to 2.4.85.0 (exc)
microsoft	hevc_video_extensions_from_device_manufacturer	to 2.4.86.0 (exc)
microsoft	hevc_video_extensions_from_device_manufacturer	to 2.5.25.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-122	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().

Attack-Flow Graph

Executive Summary

This is a heap-based buffer overflow in Microsoft Windows Codecs Library. It allows an unauthorized attacker to elevate privileges locally by exploiting a flaw in memory handling.

Impact Analysis

An attacker could gain elevated privileges on your system, allowing them to install programs, view or delete data, or create new accounts with full user rights.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, which may violate compliance requirements such as GDPR or HIPAA if sensitive data is exposed.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows Codecs Library. Disable automatic codec downloads if not required and restrict local user permissions to reduce attack surface.

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