CVE-2026-54123: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in Microsoft Microsoft Defender for Endpoint for Mac
Exposure of sensitive information to an unauthorized actor in Microsoft Defender for Endpoint allows an authorized attacker to disclose information locally.
AI Analysis
Technical Summary
This vulnerability in Microsoft Defender for Endpoint for Mac (version 101.0.0) allows an authorized local attacker to disclose sensitive information that should otherwise be protected. The CVSS 3.1 base score is 5.5, reflecting a medium severity with attack vector local, low attack complexity, low privileges required, no user interaction, and high confidentiality impact. Integrity and availability are not affected. Microsoft has published an official fix for this issue as detailed in their security update guide.
Potential Impact
An authorized user with local access to the affected system can disclose sensitive information, potentially leading to information leakage. The confidentiality impact is high, but integrity and availability are not impacted. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users of Microsoft Defender for Endpoint for Mac version 101.0.0 should apply the vendor-provided update as soon as possible to remediate this vulnerability. Refer to the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54123 for details.
CVE-2026-54123: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in Microsoft Microsoft Defender for Endpoint for Mac
Description
Exposure of sensitive information to an unauthorized actor in Microsoft Defender for Endpoint allows an authorized attacker to disclose information locally.
CVSS v3.1
Score 5.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Microsoft Defender for Endpoint for Mac (version 101.0.0) allows an authorized local attacker to disclose sensitive information that should otherwise be protected. The CVSS 3.1 base score is 5.5, reflecting a medium severity with attack vector local, low attack complexity, low privileges required, no user interaction, and high confidentiality impact. Integrity and availability are not affected. Microsoft has published an official fix for this issue as detailed in their security update guide.
Potential Impact
An authorized user with local access to the affected system can disclose sensitive information, potentially leading to information leakage. The confidentiality impact is high, but integrity and availability are not impacted. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users of Microsoft Defender for Endpoint for Mac version 101.0.0 should apply the vendor-provided update as soon as possible to remediate this vulnerability. Refer to the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54123 for details.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-11T20:33:37.836Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54123","vendor":"Microsoft"}]
Threat ID: 6a7b57f7bf8831d539155683
Added to database: 08/11/2026, 17:12:23 UTC
Last enriched: 08/11/2026, 23:13:01 UTC
Last updated: 08/12/2026, 01:00:30 UTC
Views: 6
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