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CVE-2026-50658: CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition in Microsoft Microsoft Defender for Endpoint for Mac

0
High
VulnerabilityCVE-2026-50658cvecve-2026-50658cwe-367gcve
Published: 07/14/2026 (07/14/2026, 17:08:10 UTC)
Source: CVE Database V5
Vendor/Project: Microsoft
Product: Microsoft Defender for Endpoint for Mac

Description

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

CVSS v3.1

Score 7.0high

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Affected software

GitHub Actionsmore threats →ai
microsoft/defender-for-endpoint-for-mac
pkg:github/microsoft/defender-for-endpoint-for-mac
Affected versions
=101.0.0

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/13/2026, 15:11:53 UTC

Technical Analysis

This vulnerability involves a TOCTOU race condition in Microsoft Defender for Endpoint for Mac that can be exploited by an authorized local attacker to gain elevated privileges. The issue is identified as CWE-367. The CVSS 3.1 vector indicates the attack requires local access with high attack complexity and low privileges but no user interaction. The impact includes high confidentiality, integrity, and availability impacts. Microsoft has published an official fix to address this vulnerability.

Potential Impact

An authorized local attacker can exploit this race condition to elevate privileges on the affected system. This could lead to unauthorized access to sensitive information, modification of system data, or disruption of service. The vulnerability affects confidentiality, integrity, and availability at a high level.

Mitigation Recommendations

An official fix is available from Microsoft. Users and administrators should apply the provided patch from the Microsoft Security Response Center advisory to remediate this vulnerability. No additional mitigation steps are indicated by the vendor advisory.

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Technical Details

Data Version
5.2
Assigner Short Name
microsoft
Date Reserved
2026-06-05T14:33:50.831Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
official-fix
Vendor Advisory Urls
[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50658","vendor":"Microsoft"}]

Threat ID: 6a5676a968715ace43f096dd

Added to database: 07/14/2026, 17:49:29 UTC

Last enriched: 08/13/2026, 15:11:53 UTC

Last updated: 08/26/2026, 11:03:42 UTC

Views: 71

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