CVE-2026-81353

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Heap-based Buffer Overflow in Windows Codecs Library

Publication date: 2026-09-08

Last updated on: 2026-09-11

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

2026-09-11

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-81353

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 Microsoft Windows Codecs Library. It allows an unauthorized attacker to execute arbitrary code locally on a vulnerable system by exploiting memory corruption issues.

Impact Analysis

An attacker could exploit this to run malicious code on your system, potentially leading to data theft, system damage, or unauthorized access. Since it requires local execution, physical or network access to the system may be needed.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating GDPR (data protection) and HIPAA (health data privacy) requirements. Organizations must patch systems to maintain compliance.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows Codecs Library. Disable automatic codec downloads if not required and restrict user permissions to limit local code execution risks.

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