CVE-2026-54123
A local attacker can exploit a vulnerability in Microsoft Defender for Endpoint to disclose information.
CSIRTS triage
- What
- A vulnerability in Microsoft Defender for Endpoint allows local attackers to disclose information.
- Who is affected
- Systems running Defender for Endpoint are exposed to local information disclosure.
- Urgency
- Medium priority; requires local access but impacts security product integrity.
- Action
- Apply Microsoft security updates for Defender for Endpoint.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.45% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all EPSS-scored CVEs.
Advisory coverage (4)
- medium[NEW] [medium] Microsoft Defender for Endpoint: Vulnerability enables Information Disclosurecert-bund · 2026-08-12
- unknownMultiple vulnerabilities in Microsoft products (August 12, 2026)cert-fr-avis · 2026-08-12
- mediumCVE-2026-54123: Exposure of sensitive information to an unauthorized actor in Microsoft Defender for Endpoint …nvd · 2026-08-11
- mediumCVE-2026-54123: Microsoft Defender for Endpoint for Mac Information Disclosure Vulnerabilitymsrc · 2026-08-11
External references
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[](https://www.csirts.com/cve/CVE-2026-54123)