Summary
Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability?
Any authenticated attacker could trigger this vulnerability. It does not require admin or other elevated privileges.
According to the CVSS metric, the attack vector is local (AV:L). Why does the CVE title indicate that this is a remote code execution?
The word Remote in the title refers to the location of the attacker. This type of exploit is sometimes referred to as Arbitrary Code Execution (ACE). The attack itself is carried out locally. This means an attacker or victim needs to execute code from the local machine to exploit the vulnerability.
Security updates
10.0.17763.7136 — https://support.microsoft.com/help/5055519
10.0.20348.3453 — https://support.microsoft.com/help/5055526
10.0.19044.5737 — https://support.microsoft.com/help/5055518
10.0.22621.5189 — https://support.microsoft.com/help/5055528
10.0.26100.3775 — https://support.microsoft.com/help/5055523
10.0.25398.1551 — https://support.microsoft.com/help/5055527
Vulnerabilities 1
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High 7.8
Windows Media Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows Media allows an authorized attacker to execute code locally.
Revision history
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#1
Information published.
References
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CVE-2025-26666 Windows Media Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26666
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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