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MEDIUM · 5.5

CVE-2026-56178

Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.

Vulnerability Description

Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.

CVSS Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE

Affected Products

VendorProductVersions
MicrosoftDefender For Endpoint>= 101.0.0, < 101.26042.0020

Related Weaknesses (CWE)

CWE-367

References

FAQ

What is CVE-2026-56178?

CVE-2026-56178 is a vulnerability with a CVSS score of 5.5 (MEDIUM). Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.

How severe is CVE-2026-56178?

CVE-2026-56178 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-56178?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Defender For Endpoint.