Heap-based Buffer Overflow in Windows Codecs Library

Publication date: 2026-09-08

Last updated on: 2026-09-09

Assigner: Microsoft Corporation

Description

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

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-09

Generated

2026-09-29

AI Q&A

2026-09-10

EPSS Evaluated

2026-09-27

NVD

CVE-2026-58599

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_codecs_library	*

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 vulnerability in the Microsoft Windows Codecs Library. It allows an unauthorized attacker to execute arbitrary code on a local system by exploiting a flaw in how the library handles memory operations.

Impact Analysis

An attacker could exploit this to run malicious code on your system, potentially gaining control over it. This could lead to data theft, installation of malware, or disruption of services if the attacker has local access.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows Codecs Library vulnerability. Monitor the Microsoft Update Guide for the official patch and install it immediately to prevent potential exploitation.

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