CVE-2026-34348 Windows Event Logging Service Information Disclosure Vulnerability
An authorized attacker can disclose sensitive information over the network due to a protection mechanism failure in the Windows Event Logging Service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-34348?
CVE-2026-34348 is a medium-severity vulnerability in Microsoft Windows 10 1809, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Protection mechanism failure in Windows Event Logging Service allows an authorized attacker to disclose information over a network.
Weakness: CWE-693
Which versions are affected by CVE-2026-34348?
It affects 10 products.
Products include Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 23h2, Microsoft Windows 11 24h2, Microsoft Windows 11 25h2 and 4 more.
How do I fix CVE-2026-34348?
No fix has been published for CVE-2026-34348 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-34348 being exploited?
There is no known exploitation of CVE-2026-34348 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Microsoft Windows 10 1809
- CVE-2024-29988 Microsoft SmartScreen Prompt Security Feature Bypass
- CVE-2024-21412 Microsoft Windows Internet Shortcut Files Security Feature Bypass
- CVE-2025-62221 Microsoft Windows Use After Free
- CVE-2025-30400 Microsoft Windows DWM Core Library Use-After-Free
- CVE-2024-21338 Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control
Sources
Also known as GHSA-2333-38mw-8777.