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
2 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
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 2.1.51.0 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 1.2.42.0
Event History
Sep 8, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Description
CVE Published
via MITRE·05:18 PM
Data Sourced
via MITRE·05:18 PM
DescriptionSeverity
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.