CVE-2026-83780 Windows CCFFilter Driver Remote Code Execution Vulnerability
An unauthorized attacker can execute code over a network due to a use-after-free flaw in the Windows CCFFilter Driver.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-83780?
CVE-2026-83780 is a critical use after free vulnerability in Microsoft Windows 10 Version 1607, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Use after free in Windows CCFFilter Driver allows an unauthorized attacker to execute code over a network.
Weakness: CWE-416
Which versions are affected by CVE-2026-83780?
How do I fix CVE-2026-83780?
No fix has been published for CVE-2026-83780 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-83780 being exploited?
There is no known exploitation of CVE-2026-83780 in the wild and no public exploit code.
Sources
Also known as GHSA-xrg2-c894-34f2.