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CVE-2026-54123— Microsoft Defender for Endpoint for Mac Information Disclosure Vulnerability

Quick assessment

Affected
Microsoft Microsoft Defender for Endpoint for Mac
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Defender for Endpoint是美国Microsoft公司的一套端点安全防护方案。 Microsoft Defender for Endpoint for Mac 101.26042.0020之前版本存在信息泄露漏洞，该漏洞源于向未授权行为者暴露敏感信息，可能导致已授权攻击者在本地披露敏感信息。

CVSS 5.5 · Medium EPSS 0.44% · P36

Affected Version Matrix 1

VendorProduct Version RangeStatus
Microsoft Microsoft Defender for Endpoint for Mac 101.0.0< 101.26042.0020 affected
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I. Basic Information for CVE-2026-54123

Vulnerability Information
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Vulnerability Title
Microsoft Defender for Endpoint for Mac Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Exposure of sensitive information to an unauthorized actor in Microsoft Defender for Endpoint allows an authorized attacker to disclose information locally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Defender for Endpoint 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Defender for Endpoint是美国Microsoft公司的一套端点安全防护方案。 Microsoft Defender for Endpoint for Mac 101.26042.0020之前版本存在信息泄露漏洞，该漏洞源于向未授权行为者暴露敏感信息，可能导致已授权攻击者在本地披露敏感信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Microsoft Defender for Endpoint for Mac 101.0.0 ~ 101.26042.0020 -

II. Public POCs for CVE-2026-54123

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III. Intelligence Information for CVE-2026-54123

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Vendor Advisories for CVE-2026-54123 (1)

Same Patch Batch · Microsoft · 2026-08-11 · 402 CVEs total

CVE-2026-65791 9.8 CRITICAL Windows iSCSI Target Service Remote Code Execution Vulnerability
CVE-2026-62893 9.8 CRITICAL Windows Deployment Services TFTP Server Remote Code Execution Vulnerability
CVE-2026-62878 9.8 CRITICAL Windows DNS Server Remote Code Execution Vulnerability
CVE-2026-62815 9.8 CRITICAL Microsoft QUIC Remote Code Execution Vulnerability
CVE-2026-59124 9.8 CRITICAL Microsoft High Performance Computing (HPC) Pack Remote Code Execution Vulnerability
CVE-2026-50516 9.4 CRITICAL Microsoft Azure Kubernetes Service Elevation of Privilege Vulnerability
CVE-2026-70306 9.3 CRITICAL Microsoft Office SharePoint Spoofing Vulnerability
CVE-2026-65660 8.8 HIGH Microsoft SharePoint Server Remote Code Execution Vulnerability
CVE-2026-70336 8.8 HIGH Visual Studio Code Remote Code Execution Vulnerability
CVE-2026-65663 8.8 HIGH Microsoft SharePoint Server Remote Code Execution Vulnerability
CVE-2026-65658 8.8 HIGH Microsoft SharePoint Server Remote Code Execution Vulnerability
CVE-2026-62817 8.8 HIGH Windows DNS Server Remote Code Execution Vulnerability
CVE-2026-62816 8.8 HIGH Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution Vulnerability
CVE-2026-62818 8.8 HIGH Windows Active Directory Certificate Services (AD CS) Remote Code Execution Vulnerability
CVE-2026-69320 8.8 HIGH Visual Studio Code Remote Code Execution Vulnerability
CVE-2026-62872 8.8 HIGH .NET Framework Elevation of Privilege Vulnerability
CVE-2026-66808 8.8 HIGH Microsoft SharePoint Server Remote Code Execution Vulnerability
CVE-2026-70337 8.8 HIGH Microsoft PowerShell Remote Code Execution Vulnerability
CVE-2026-66805 8.8 HIGH Microsoft SharePoint Server Remote Code Execution Vulnerability
CVE-2026-62800 8.8 HIGH Windows SMBv3 Server Remote Code Execution Vulnerability

Showing top 20 of 402 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Microsoft Defender for Endpoint for Mac
Same vendor: Microsoft
Same weakness: CWE-200

V. Comments for CVE-2026-54123

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