Information disclosure in Microsoft Defender For Endpoint
CVE-2026-54123
Exposure of sensitive information to an unauthorized actor in Microsoft Defender for Endpoint allows an authorized attacker to disclose information locally.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (38.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000
Affected products
- Microsoft Defender For Endpoint
- Microsoft Defender For Endpoint Mac — versions 101.0.0
Weakness classification (CWE)
References
- Microsoft Defender for Endpoint for Mac Information Disclosure Vulnerability (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-54123?
- CVE-2026-54123 is a medium-severity vulnerability in Microsoft Defender For Endpoint, classified under Information Disclosure. CVSS score: 5.5/10. Published 2026-08-11.
- How severe is CVE-2026-54123?
- Medium severity. CVSS v3 base score is 5.5 out of 10.