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

Source: https://junglewise.ai/threats/cve-2026-83780-use-after-free-in-windows-ccffilter-driver-allows-an-unauthorized  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-11-02  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/technologies/windows), [Microsoft Windows 10 1607](https://junglewise.ai/threats/technologies/windows-10-1607), [Microsoft Windows 10 1809](https://junglewise.ai/threats/technologies/windows-10-1809), [Microsoft Windows Server 2016](https://junglewise.ai/threats/technologies/windows-server-2016), [Microsoft Windows Server 2019](https://junglewise.ai/threats/technologies/windows-server-2019), [Microsoft Windows Server 2022](https://junglewise.ai/threats/technologies/windows-server-2022), [Microsoft Windows Server 2025](https://junglewise.ai/threats/technologies/windows-server-2025). Vendors: [Microsoft](https://junglewise.ai/threats/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](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83780)

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