CVE-2026-83517

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Heap-based Buffer Overflow in Microsoft Windows Media Foundation

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Heap-based buffer overflow in Microsoft Windows Media Foundation allows an unauthorized attacker to execute code over a network.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-10-13

Last Modified

2026-10-16

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-83517

EUVD

EUVD-2026-99910

Affected Vendors & Products

Vendor	Product	Version / Range
Microsoft	Windows	10 Version 1607 10.0.14393.0
Microsoft	Windows	10 Version 1809 10.0.17763.0
Microsoft	Windows	10 Version 21H2 10.0.19044.0
Microsoft	Windows	10 Version 22H2 10.0.19045.0
Microsoft	Windows	11 version 23H2 10.0.22631.0
Microsoft	Windows	11 Version 23H2 10.0.22631.0
Microsoft	Windows	11 Version 24H2 10.0.26100.0
Microsoft	Windows	11 Version 25H2 10.0.26200.0
Microsoft	Windows	11 version 26H1 10.0.28000.0
Microsoft	Windows	11 Version 26H2 10.0.26300.0
Microsoft	Windows	Server 2012 6.2.9200.0
Microsoft	Windows	Server 2012 (Server Core installation) 6.2.9200.0
Microsoft	Windows	Server 2012 R2 6.3.9600.0
Microsoft	Windows	Server 2012 R2 (Server Core installation) 6.3.9600.0
Microsoft	Windows	Server 2016 10.0.14393.0
Microsoft	Windows	Server 2016 (Server Core installation) 10.0.14393.0
Microsoft	Windows	Server 2019 10.0.17763.0
Microsoft	Windows	Server 2019 (Server Core installation) 10.0.17763.0
Microsoft	Windows	Server 2022 10.0.20348.0
Microsoft	Windows	Server 2025 10.0.26100.0
Microsoft	Windows	Server 2025 (Server Core installation) 10.0.26100.0

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 Media Foundation. It allows an unauthorized attacker to execute arbitrary code over a network by exploiting a flaw in memory handling. The vulnerability has a high severity with a CVSS score of 9.8.

Impact Analysis

An attacker could exploit this to run malicious code on your system remotely, potentially leading to data theft, system compromise, or installation of malware. It affects multiple Windows versions including Windows 10, 11, and various Server editions.

Compliance Impact

This vulnerability allows remote code execution via a heap-based buffer overflow in Windows Media Foundation. Such vulnerabilities can lead to unauthorized access, data breaches, or system compromise, which may violate compliance requirements under GDPR (data protection) and HIPAA (health data security) by exposing sensitive information or failing to ensure system integrity.

Mitigation Strategies

Apply the latest security updates from Microsoft immediately. Disable or restrict access to Windows Media Foundation components if not required. Monitor network traffic for unusual activity targeting media processing services.

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