Information disclosure in Microsoft Windows Server 2016
CVE-2026-20818
Insertion of sensitive information into log file in Windows Kernel allows an unauthorized attacker to disclose information locally.
EPSS: 0.007 (48.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Microsoft Windows Server 2016 — versions 10.0.14393.0
- Microsoft Windows_server_2016
- Microsoft Windows Server 2016 (Server Core Installation) — versions 10.0.14393.0
- Microsoft Windows Server 2019 — versions 10.0.17763.0
- Microsoft Windows_server_2019
- Microsoft Windows Server 2019 (Server Core Installation) — versions 10.0.17763.0
- Microsoft Windows Server 2022 — versions 10.0.20348.0
- Microsoft Windows_server_2022
- Microsoft Windows_server_2022_23h2
- Microsoft Windows Server 2022, 23h2 Edition (Server Core Installation) — versions 10.0.25398.0
Weakness classification (CWE)
References
- secure@microsoft.com (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-20818?
- CVE-2026-20818 is a medium-severity vulnerability in Microsoft Windows Server 2016, classified under Insertion of Sensitive Information into Log File. CVSS score: 6.2/10. Published 2026-01-13.
- How severe is CVE-2026-20818?
- Medium severity. CVSS v3 base score is 6.2 out of 10.