Is CVE-2026-83780 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-83780 being exploited in the wild.

How severe is CVE-2026-83780?

Critical severity, with a CVSS score of 9.8, published 13 October 2026.

Is there a fix for CVE-2026-83780?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-83780 attacked?

It is attacked over the network, in an operating system.

Am I affected by CVE-2026-83780?

Check whether you run Microsoft Windows, Microsoft Windows 10 1607, Microsoft Windows 10 1809 or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-83780: Microsoft Windows CCFFilter Driver use-after-free remote code execution

CVE-2026-83780 · Severity: critical · CVSS 9.8 · Published 2026-10-13

A use-after-free vulnerability in Microsoft Windows CCFFilter Driver allows attackers to execute arbitrary code remotely on affected systems. An attacker can exploit this over a network without authentication to gain complete control of a Windows computer, enabling ransomware deployment, data theft, or lateral movement within a network.

Technologies: Microsoft Windows, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022, Microsoft Windows Server 2025. Vendors: Microsoft.

Quick answers

Is CVE-2026-83780 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-83780 being exploited in the wild.
How severe is CVE-2026-83780?: Critical severity, with a CVSS score of 9.8, published 13 October 2026.
Which products and versions are affected?: Microsoft Windows.
Is there a fix for CVE-2026-83780?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-83780 attacked?: It is attacked over the network, in an operating system.
Am I affected by CVE-2026-83780?: Check whether you run Microsoft Windows, Microsoft Windows 10 1607, Microsoft Windows 10 1809 or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A use-after-free memory corruption flaw exists in the Windows CCFFilter Driver, exploitable over the network without requiring user interaction or prior authentication. The vulnerability permits remote code execution with system-level privileges. Microsoft has released patches to address this issue.

Affected products

Microsoft Windows

Timeline

2026-10-13: disclosed

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83780

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