Incorrect authorization in Microsoft Windows and Windows Server - CVE-2026-70299
Published: October 14, 2026
Vulnerability identifier: #VU154718
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-2026-70299
CWE-ID: CWE-863
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges to SYSTEM.
The vulnerability exists due to incorrect authorization in Windows Bind Filter Driver when handling local access. A local user can exploit the driver's improper access control to escalate privileges to SYSTEM.
Exploitation can originate from a low-privilege AppContainer and cross its security boundary, enabling code execution or resource access at a higher integrity level.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-70299
Install security update from vendor's website.
Microsoft Windows - update to 11 23H2 10.0.22631.7652
Windows Server - update to 2025 10.0.26100.33650
Windows Server - update to 2025 10.0.26100.33650