CVE-2026-85840 Windows Event Viewer Information Disclosure Vulnerability
An authorized attacker can disclose sensitive information over a network via accessible files in Windows Event Viewer.
- 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-2026-85840?
CVE-2026-85840 is a medium-severity vulnerability in Microsoft Windows 10 1607, published on 13 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Files or directories accessible to external parties in Windows Event Viewer allows an authorized attacker to disclose information over a network.
Weakness: CWE-552
Which versions are affected by CVE-2026-85840?
It affects 14 products.
Products include Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 23h2, Microsoft Windows 11 24h2 and 8 more.
How do I fix CVE-2026-85840?
No fix has been published for CVE-2026-85840 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-85840 being exploited?
There is no known exploitation of CVE-2026-85840 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 10 1607
- CVE-2026-33824 Microsoft Internet Key Exchange (IKE) Service Extensions Double Free
- CVE-2026-21510 Microsoft Windows Shell Protection Mechanism Failure
- CVE-2026-21513 Microsoft MSHTML Framework Protection Mechanism Failure
- CVE-2023-32049 Microsoft Windows Defender SmartScreen Security Feature Bypass
- CVE-2023-29360 Microsoft Streaming Service Untrusted Pointer Dereference
Sources
Also known as GHSA-cjvx-9c8p-95h9.