What is CVE-2026-20818?

CVE-2026-20818 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Windows Kernel Information Disclosure Vulnerability

Which CVE IDs does CVE-2026-20818 cover?

CVE-2026-20818 covers the following CVE IDs: CVE-2026-20818. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-20818?

CVE-2026-20818 has a CVSS v3 base score of 6.2, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-20818?

CVE-2026-20818 affects 9 products, including: Windows Server 2016; Windows Server 2016 (Server Core installation); Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server 2022; and others — see the full list on the advisory page.

CVE-2026-20818HighCVSS 6.2

Windows Kernel Information Disclosure Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

June 2, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-20818 →

📋 Description

Insertion of sensitive information into log file in Windows Kernel allows an unauthorized attacker to disclose information locally.

🎯 Affected products9

Windows Server 2016
Windows Server 2016 (Server Core installation)
Windows Server 2019
Windows Server 2019 (Server Core installation)
Windows Server 2022
Windows Server 2022 (Server Core installation)
Windows Server 2022, 23H2 Edition (Server Core installation)
Windows Server 2025
Windows Server 2025 (Server Core installation)

✅ Remediation

KB5073723 (Security Update) — fixed build 10.0.17763.8276 KB5073457 (Security Update) — fixed build 10.0.20348.4648 KB5073379 (Security Update) — fixed build 10.0.26100.32230 KB5073450 (Security Update) — fixed build 10.0.25398.2092 KB5073722 (Security Update) — fixed build 10.0.14393.8783

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products9

✅ Remediation

🔗 References (12)