Defender for Endpoint and Antivirus
CVE-2026-54123: Microsoft Defender for Endpoint for Mac Information Disclosure Vulnerability
Exposure of sensitive information to an unauthorized actor in Microsoft Defender for Endpoint allows an authorized attacker to disclose information locally.
Published
ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityMEDIUMCVSS 3.1 5.5
EPSS0.48%Chance of exploitation in 30 days
Public exploitNot tracked
FixAvailable
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Microsoft Defender for Endpoint for Mac 101.0 | 101.26042.0020 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
Exposure of sensitive information to an unauthorized actor in Microsoft Defender for Endpoint allows an authorized attacker to disclose information locally.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 11 Oct 2026.