Heap-based buffer overflow in Microsoft Windows and Windows Server - CVE-2026-50679
Published: July 17, 2026
Vulnerability identifier: #VU138096
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-50679
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to heap-based buffer overflow in Windows Search Component when processing input. A local user can trigger the flaw to escalate privileges.
Successful exploitation could allow elevation from Medium Integrity Level to a High Integrity Level and gain SYSTEM privileges.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-50679
Install security update from vendor's website.
Microsoft Windows - addressed in versions 11 24H2 10.0.26100.8875, 11 25H2 10.0.26200.8875, 11 26H1 10.0.28000.2269, 11 26H1 10.0.28000.2525
Windows Server - addressed in versions 2012 R2 6.3.9600.23291, 2025 10.0.26100.33158
Windows Server - addressed in versions 2012 R2 6.3.9600.23291, 2025 10.0.26100.33158