Information disclosure in Defender for Endpoint for macOS - CVE-2026-54123
Published: August 13, 2026
Vulnerability identifier: #VU142256
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-54123
CWE-ID: CWE-200
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to excessive data output by the application in Microsoft Defender for Endpoint for Mac. A local user can gain unauthorized access to sensitive information on the system.
Affected software
Defender for Endpoint for macOS
How to mitigate CVE-2026-54123
Install updates from vendor's website.
Defender for Endpoint for macOS - update to 101.26042.0020