CVE-2026-45647: CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition in Microsoft Microsoft Defender for Endpoint for Mac
Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability is a TOCTOU race condition in Microsoft Defender for Endpoint for Mac, identified as CWE-367. It enables an authorized local attacker to elevate privileges by exploiting a timing window between checking and using a resource. The CVSS 3.1 base score is 5.5 (medium severity), reflecting local attack vector with low complexity and no user interaction required. Microsoft has released an official fix for this vulnerability, as documented in their security update guide.
Potential Impact
An authorized local attacker can exploit this race condition to elevate their privileges on the affected system. This could lead to unauthorized actions with higher privileges, potentially compromising system integrity. There is no impact on confidentiality or availability reported. No known exploits are currently active in the wild.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. Users of Microsoft Defender for Endpoint for Mac version 101.0.0 should apply the provided patch as soon as possible. Refer to the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45647 for detailed remediation instructions.
CVE-2026-45647: CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition in Microsoft Microsoft Defender for Endpoint for Mac
Description
Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Endpoint allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 5.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a TOCTOU race condition in Microsoft Defender for Endpoint for Mac, identified as CWE-367. It enables an authorized local attacker to elevate privileges by exploiting a timing window between checking and using a resource. The CVSS 3.1 base score is 5.5 (medium severity), reflecting local attack vector with low complexity and no user interaction required. Microsoft has released an official fix for this vulnerability, as documented in their security update guide.
Potential Impact
An authorized local attacker can exploit this race condition to elevate their privileges on the affected system. This could lead to unauthorized actions with higher privileges, potentially compromising system integrity. There is no impact on confidentiality or availability reported. No known exploits are currently active in the wild.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. Users of Microsoft Defender for Endpoint for Mac version 101.0.0 should apply the provided patch as soon as possible. Refer to the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45647 for detailed remediation instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-12T20:33:35.157Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45647","vendor":"Microsoft"}]
Threat ID: 6a284ce98dd33fbd85664eef
Added to database: 6/9/2026, 5:27:05 PM
Last enriched: 6/9/2026, 9:59:03 PM
Last updated: 6/10/2026, 7:06:42 AM
Views: 4
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