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Microsoft Security Response CenterCVE-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.

Read the vendor bulletin Get alerts for Microsoft Defender for Endpoint for Mac
5.5CVSS out of 10High severity
Scope

What the vendor says is affected

  • Microsoft Defender for Endpoint for Mac

Versions the vendor lists as fixed

  • 101.26042.0020
Next step

What the vendor recommends

Release Notes

Review the complete instructions on the vendor's site
Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • The vendor changed its remediation guidance.
Timeline

When this advisory changed

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-54123View CVSS, KEV, EPSS, and threat context
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