---
id: CVE-2026-54123
title: Microsoft Defender for Endpoint for Mac Information Disclosure Vulnerability
summary: >-
  Exposure of sensitive information to an unauthorized actor in Microsoft
  Defender for Endpoint allows an authorized attacker to disclose information
  locally.
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-200
vendor: Microsoft
product: Microsoft Defender for Endpoint for Mac
affected:
  - defender_for_endpoint_for_mac >= 101.0.0 < 101.26042.0020
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-12T13:24:06.058537Z'
published: '2026-08-11'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T19:36:36.417Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-54123'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54123'
    label: >-
      Microsoft Defender for Endpoint for Mac Information Disclosure
      Vulnerability
tags:
  - cve.org
epss: 0.00479
epssPercentile: 0.38709
ingestedAt: '2026-09-08T18:07:34.897Z'
---

## Overview

Exposure of sensitive information to an unauthorized actor in Microsoft Defender for Endpoint allows an authorized attacker to disclose information locally.

## Affected

- `defender_for_endpoint_for_mac >= 101.0.0 < 101.26042.0020`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.