Time-of-check Time-of-use (TOCTOU) Race Condition in Defender for Endpoint for macOS - CVE-2026-45647
Published: June 10, 2026
Vulnerability identifier: #VU134201
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-45647
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Defender for Endpoint for macOS
Defender for Endpoint for macOS
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a time-of-check, time-of-use (TOCTOU) race condition in Microsoft Defender for Endpoint for Mac. A local user can gain elevated privileges on the target system.
How to mitigate CVE-2026-45647
Install updates from vendor's website.