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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.002 (12.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 12.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Microsoft Defender For Endpoint
- Microsoft Defender For Endpoint Mac — versions 101.0.0
Weakness classification (CWE)
References
- Microsoft Defender for Endpoint for Mac Elevation of Privilege Vulnerability (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.