Vulnerability in Microsoft Defender_for_endpoint
CVE-2026-45647
Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
EPSS: 0.002 (12.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Microsoft Defender_for_endpoint
- Microsoft Defender For Endpoint Mac — versions 101.0.0
Weakness classification (CWE)
References
- secure@microsoft.com (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-45647?
- CVE-2026-45647 is a medium-severity vulnerability in Microsoft Defender_for_endpoint, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.5/10. Published 2026-06-09.
- How severe is CVE-2026-45647?
- Medium severity. CVSS v3 base score is 5.5 out of 10.