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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.007 (52.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000
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
- Windows Kernel Information Disclosure Vulnerability (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.