CVE-2026-50657
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2026-50657 is indexed in GitHub PoC. Expect opportunistic scanning and exploitation attempts — prioritize remediation even though it is not (yet) in the CISA KEV catalog.
An attacker can exploit multiple vulnerabilities in Microsoft Malware Protection Engine and Microsoft Defender to execute arbitrary code, gain elevated permissions, or disclose sensitive information.
CSIRTS triage
- What
- Multiple vulnerabilities can be exploited to execute arbitrary code and disclose sensitive information.
- Who is affected
- Users of Microsoft Malware Protection Engine and Microsoft Defender are affected.
- Urgency
- Remediation is medium priority due to the potential for exploitation.
- Action
- Update Microsoft Malware Protection Engine and Defender to the latest versions.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2026-50657 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
Advisory coverage (5)
- medium[NEW] [medium] Microsoft Malware Protection Engine and Defender: Multiple vulnerabilitiescert-bund · 2026-07-15
- unknownMultiple vulnerabilities in Microsoft products (July 15, 2026)cert-fr-avis · 2026-07-15
- unknownNCSC-2026-0236 [1.00] [M/H] Vulnerabilities fixed in Microsoft Defenderncsc-nl · 2026-07-14
- mediumCVE-2026-50657: Exposure of private personal information to an unauthorized actor in Microsoft Defender allows…nvd · 2026-07-14
- mediumCVE-2026-50657: Microsoft Defender for Endpoint for Mac Information Disclosure Vulnerabilitymsrc · 2026-07-14
External references
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[](https://www.csirts.com/cve/CVE-2026-50657)