Microsoft has published details on CVE-2026-62744, a heap-based buffer overflow in Windows Media Foundation that allows unauthorized remote code execution with a CVSS score of 8.8. The flaw requires a user to open a specially crafted media file and is included in the September 2026 security updates.
It allows an unauthorized attacker to execute code over a network.
No public disclosure or active exploitation is noted at the time of release.
Enterprises should prioritize the September 2026 patch bundle and monitor for user-targeted lures involving media files, as the high confidentiality and integrity impact could enable broad system compromise.
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