CVE-2026-50658: 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 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 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.
CVE-2026-50658: 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 allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.0high
Affected software
pkg:github/microsoft/defender-for-endpoint-for-macRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
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.
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
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.