CVE-2026-20818 Windows Kernel Information Disclosure Vulnerability
An unauthorized local attacker can disclose sensitive information via Windows Kernel log files, requiring a patch for Windows Server systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-20818?
CVE-2026-20818 is a medium-severity vulnerability in Microsoft Windows Server 2016, published on 13 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Insertion of sensitive information into log file in Windows Kernel allows an unauthorized attacker to disclose information locally.
Weakness: CWE-532
Which versions are affected by CVE-2026-20818?
It affects 5 products.
Products include Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022, Microsoft Windows Server 2022 23h2, Microsoft Windows Server 2025.
How do I fix CVE-2026-20818?
No fix has been published for CVE-2026-20818 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-20818 being exploited?
There is no known exploitation of CVE-2026-20818 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows Server 2016
- CVE-2021-34458 Windows Kernel Remote Code Execution Vulnerability
- CVE-2024-38076 Windows Remote Desktop Licensing Service Remote Code Execution Vulnerability
- CVE-2026-27928 Windows Hello Security Feature Bypass Vulnerability
- CVE-2025-27482 Windows Remote Desktop Services Remote Code Execution Vulnerability
- CVE-2024-49106 Windows Remote Desktop Services Remote Code Execution Vulnerability
Sources
Also known as GHSA-hxrp-mjg3-hpmr.