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Vulnerability record · CVE-2026-45647 · published 9 June 2026

CVE-2026-45647: Microsoft defender for endpoint toctou race condition vulnerability

Microsoft · Defender For Endpoint

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

7.0 CVSS 3.1 High EPSS 0.23% · top 87.2% CWE-367 · TOCTOU race condition
7.0CVSS 3.1 base score
0.23%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
23 Jul 2026Last modified by NVD

Description

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

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45647 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2026-21537Microsoft defender for endpoint code injection vulnerabilityImproper control of generation of code ('code injection') in Microsoft Defender for Linux allows an unauthorized attacker to execute code over an adj…EPSS 0.56%8.1CVE-2024-49057Microsoft defender for endpoint improper input validation vulnerabilityMicrosoft Defender for Endpoint on Android Spoofing VulnerabilityEPSS 1.7%7.8CVE-2025-47161Microsoft defender for endpoint improper access control vulnerabilityImproper access control in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.EPSS 0.80%7.8CVE-2024-21315Microsoft defender for endpoint improper input validation vulnerabilityMicrosoft Defender for Endpoint Protection Elevation of Privilege VulnerabilityEPSS 0.64%7.8CVE-2022-35828Microsoft defender for endpoint vulnerabilityMicrosoft Defender for Endpoint for Mac Elevation of Privilege VulnerabilityEPSS 0.53%7.0CVE-2026-56178Microsoft defender for endpoint toctou race condition vulnerabilityTime-of-check time-of-use (toctou) race condition in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.EPSS 0.23%7.0CVE-2026-50658Microsoft defender for endpoint toctou race condition vulnerabilityTime-of-check time-of-use (toctou) race condition in Microsoft Defender allows an authorized attacker to elevate privileges locally.EPSS 0.20%6.7CVE-2025-26684Microsoft defender for endpoint vulnerabilityExternal control of file name or path in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.EPSS 0.42%

Source: NIST National Vulnerability Database (record CVE-2026-45647), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.