CVE-2026-100220: Windows Media Video Decoder Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows Media Video Decoder allows an unauthorized attacker to execute code over a network.
Other sources
Windows Media Video Decoder Remote Code Execution Vulnerability
— Microsoft
Affected Software
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 10.0.26200.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
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Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
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Fixed in 6.3.9600.23470Patch KB5126836 - Upgrade
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Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
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Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
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Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
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Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
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Fixed in 6.2.9200.26434Patch KB5126835
Event History
Frequently Asked Questions
Does exploitation require an attacker to have an account or existing privileges?
No. The vector is rated as requiring no privileges, so the attacker does not need an authenticated account or pre-existing access.
Is user interaction required for exploitation?
Yes. The CVSS vector indicates that user interaction is required, meaning exploitation depends on a user action.
What systems are identified as affected?
The listed affected software includes Microsoft Windows 10, Windows 11, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019, Windows Server 2022, and Windows Server 2025.
What could a successful compromise allow?
The vulnerability is rated High for confidentiality, integrity, and availability impact. Successful exploitation could therefore expose data, enable modification of data or systems, and disrupt service availability.