Heap-based buffer overflow in Microsoft Windows and Windows Server - CVE-2026-62744
Published: September 8, 2026
Vulnerability identifier: #VU147482
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-62744
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to a heap-based buffer overflow in Microsoft Windows Media Foundation when opening a specially crafted file. A remote attacker can trick a user into opening a specially crafted file to execute arbitrary code.
User interaction is required to open a specially crafted file.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-62744
Install security update from vendor's website.
Microsoft Windows - addressed in versions 11 24H2 10.0.26100.9445, 11 25H2 10.0.26200.9445, 11 26H1 10.0.28000.2954
Windows Server - update to 2025 10.0.26100.33438
Windows Server - update to 2025 10.0.26100.33438