CVE-2026-50657: Microsoft Defender for Endpoint for Mac Information Disclosure Vulnerability

mediumpublic exploitCVSS 4.7CVE-2026-50657

Exposure of private personal information to an unauthorized actor in Microsoft Defender allows an authorized attacker to disclose information locally.

CSIRTS triage

vendor: Microsoft product: Defender for Endpoint for Mac Information disclosure

What: Exposure of private personal information to an unauthorized actor in Microsoft Defender allows an authorized attacker to disclose information locally.
Who is affected: Users of Microsoft Defender for Endpoint on Mac.
Urgency: Remediation is necessary to protect sensitive information, though the severity is medium.
Action: Update Microsoft Defender for Endpoint for Mac to the latest version.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 4.7
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50657

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-506570.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-50657	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

medium[NEW] [medium] Microsoft Malware Protection Engine and Defender: Multiple vulnerabilitiescert-bund
unknownMultiple vulnerabilities in Microsoft products (July 15, 2026)cert-fr-avis
unknownNCSC-2026-0236 [1.00] [M/H] Vulnerabilities fixed in Microsoft Defenderncsc-nl
mediumCVE-2026-50657: Exposure of private personal information to an unauthorized actor in Microsoft Defender allows…nvd

Recent advisories for Microsoft Defender for

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

medium[NEW] [medium] Microsoft Malware Protection Engine and Defender: Multiple vulnerabilitiescert-bund · 2026-07-15
unknownNCSC-2026-0236 [1.00] [M/H] Vulnerabilities fixed in Microsoft Defenderncsc-nl · 2026-07-14
mediumCVE-2026-56178: Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Endpoint allows an…nvd · 2026-07-14
highCVE-2026-50658: Time-of-check time-of-use (toctou) race condition in Microsoft Defender allows an authorized a…nvd · 2026-07-14
mediumCVE-2026-50657: Exposure of private personal information to an unauthorized actor in Microsoft Defender allows…nvd · 2026-07-14
highCVE-2026-55012: Integer overflow or wraparound in Microsoft Defender allows an unauthorized attacker to execut…nvd · 2026-07-14