CVE-2026-81352: Web Media Extensions Remote Code Execution Vulnerability
Published Sep 8, 2026
·Updated
Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to execute code over a network.
Other sources
Web Media Extensions Remote Code Execution Vulnerability
— Microsoft
Affected Software
18 affected componentsFixes available
Microsoft Web Media Extensions<2.1.51.0
2.1.51.0
Microsoft Web Media Extensions<1.2.42.0
1.2.42.0
All of the following
Microsoft Web Media Extensions<1.2.42.0
Any of the following
Microsoft Windows 10 21h2<10.0.19044.7725
Microsoft Windows 10 21h2<10.0.19044.7725
Microsoft Windows 10 21h2<10.0.19044.7725
Microsoft Windows 10 22h2<10.0.19045.7725
Microsoft Windows 10 22h2<10.0.19045.7725
Microsoft Windows 10 22h2<10.0.19045.7725
All of the following
Microsoft Web Media Extensions<2.1.51.0
Any of the following
Microsoft Windows 11 23h2
Microsoft Windows 11 23h2
Microsoft Windows 11 24h2
Microsoft Windows 11 24h2
Microsoft Windows 11 25h2
Microsoft Windows 11 25h2
Microsoft Windows 11 26h1
Microsoft Windows 11 26h1
Remediation
Event History
Sep 8, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·05:18 PM
Data Sourced
via MITRE·05:18 PM
DescriptionSeverity
Data Sourced
via NVD·06:20 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
Does exploitation require an authenticated account or user involvement?
No attacker authentication is required, and the attack can be delivered over a network. Exploitation does require user interaction.
2
Which systems should be prioritized for remediation?
Systems running Microsoft Web Media Extensions should be prioritized. Successful exploitation can result in code execution with high impact to confidentiality, integrity, and availability.