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 involves a TOCTOU race condition in Microsoft Defender for Endpoint for Mac, identified as CWE-367. It enables an authorized attacker with local access to escalate privileges by exploiting the timing between checking and using a resource. The CVSS 3.1 vector indicates low attack complexity, low privileges required, no user interaction, and impact limited to integrity. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized local attacker can exploit this race condition to elevate privileges, potentially allowing unauthorized modification of system or application integrity. There is no impact on confidentiality or availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the patch provided by Microsoft Defender for Endpoint for Mac as detailed in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45647 to remediate this vulnerability.
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
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a TOCTOU race condition in Microsoft Defender for Endpoint for Mac, identified as CWE-367. It enables an authorized attacker with local access to escalate privileges by exploiting the timing between checking and using a resource. The CVSS 3.1 vector indicates low attack complexity, low privileges required, no user interaction, and impact limited to integrity. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized local attacker can exploit this race condition to elevate privileges, potentially allowing unauthorized modification of system or application integrity. There is no impact on confidentiality or availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the patch provided by Microsoft Defender for Endpoint for Mac as detailed in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45647 to remediate this vulnerability.
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: 06/09/2026, 17:27:05 UTC
Last enriched: 07/29/2026, 22:02:32 UTC
Last updated: 07/31/2026, 20:43:24 UTC
Views: 275
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