What is CVE-2026-45647?

CVE-2026-45647 is a medium-severity vulnerability, 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.

CVE-2026-45647

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)

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.

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

secure@microsoft.com

Frequently asked questions

What is CVE-2026-45647?: CVE-2026-45647 is a medium-severity vulnerability, 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.