Out-of-bounds read in Defender for Endpoint for Windows - CVE-2026-105726
Published: October 13, 2026
Vulnerability identifier: #VU154312
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-105726
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in Microsoft Defender. A local user can trigger an out-of-bounds read error and read contents of memory on the system.
Affected software
Defender for Endpoint for Windows
How to mitigate CVE-2026-105726
Install updates from vendor's website.
Defender for Endpoint for Windows - update to 4.18.26060.3008