Heap-based buffer overflow in Windows and Windows Server - CVE-2026-49804
Published: July 17, 2026
Vulnerability identifier: #VU137978
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-49804
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows Server
Detailed vulnerability description
The vulnerability allows an attacker with physical access to elevate privileges.
The vulnerability exists due to heap-based buffer overflow in Windows USB Video Driver when processing USB video input. An attacker with physical access can provide a specially crafted physical device to elevate privileges.
How to mitigate CVE-2026-49804
Install security update from vendor's website.