Summary
Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
How could an attacker exploit this vulnerability?
An attacker would have to convince a user to play specially crafted media with the affected subtitle track enabled. Successful exploitation could allow the attacker to execute code with the permissions of the user's media player.
Security updates
10.0.14393.9688 — https://support.microsoft.com/help/5131291
10.0.17763.9487 — https://support.microsoft.com/help/5131085
10.0.19044.7846 — https://support.microsoft.com/help/5131096
10.0.20348.5870 — https://support.microsoft.com/help/5131090
10.0.22631.7711 — https://support.microsoft.com/help/5131087
10.0.26100.9974 — https://support.microsoft.com/help/5132061
10.0.26100.9911 — https://support.microsoft.com/help/5132043
10.0.26100.33822 — https://support.microsoft.com/help/5131080
10.0.26100.33730 — https://support.microsoft.com/help/5131077
10.0.28000.3501 — https://support.microsoft.com/help/5132059
Vulnerabilities 1
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High 8.8
Windows Media Player Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows Media Player allows an unauthorized attacker to execute code over a network.
Revision history
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#1
Information published.
References
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CVE-2026-88229 Windows Media Player Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88229
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss