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CVE-2026-83780

CriticalCVSS 9.8/10Last modified Nov 2, 2026

Description

Use after free in Windows CCFFilter Driver allows an unauthorized attacker to execute code over a network.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

Vendor	Product	Versions
Microsoft	Windows 10 Version 1607	>= 10.0.14393.0, < 10.0.14393.9612
Microsoft	Windows 10 Version 1809	>= 10.0.17763.0, < 10.0.17763.9376
Microsoft	Windows Server 2016	>= 10.0.14393.0, < 10.0.14393.9612
Microsoft	Windows Server 2016 (Server Core installation)	>= 10.0.14393.0, < 10.0.14393.9612
Microsoft	Windows Server 2019	>= 10.0.17763.0, < 10.0.17763.9376
Microsoft	Windows Server 2019 (Server Core installation)	>= 10.0.17763.0, < 10.0.17763.9376
Microsoft	Windows Server 2022	>= 10.0.20348.0, < 10.0.20348.5761
Microsoft	Windows Server 2025	>= 10.0.26100.0, < 10.0.26100.33650
Microsoft	Windows Server 2025 (Server Core installation)	>= 10.0.26100.0, < 10.0.26100.33650

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83780Patch, Vendor Advisory

Timeline

Published: Oct 13, 2026
Last modified: Nov 2, 2026
NVD status: Analyzed

Related CVEs from 2026

CVE-2026-837817.8Improper null termination in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.CVE-2026-837829.8Heap-based buffer overflow in Windows Shell allows an unauthorized attacker to execute code over a network.CVE-2026-837837.8Heap-based buffer overflow in Windows Management Instrumentation allows an authorized attacker to elevate privileges locally.CVE-2026-837848.8Absolute path traversal in Windows Encrypting File System (EFS) allows an authorized attacker to elevate privileges over a network.CVE-2026-837857.0Use after free in Windows COM+ Event System Service allows an authorized attacker to elevate privileges locally.CVE-2026-837864.7Generation of error message containing sensitive information in Windows NTFS allows an authorized attacker to disclose information locally.CVE-2026-837875.5Insufficient verification of data authenticity in Windows DHCP Server allows an authorized attacker to bypass a security feature locally.CVE-2026-837884.6Buffer over-read in Windows RNDIS allows an unauthorized attacker to disclose information with a physical attack.CVE-2026-837899.8Heap-based buffer overflow in Windows SMB Client allows an unauthorized attacker to elevate privileges over a network.CVE-2026-83797.5The Frontend File Manager Plugin WordPress plugin through 23.6 does not properly enforce its nonce check on the file download handler, allow CVE-2026-837907.0Use after free in Windows Hello allows an authorized attacker to elevate privileges locally.CVE-2026-837917.8Improper authorization in Windows Virtual Input allows an authorized attacker to elevate privileges locally.

CVE-2026-83780: Critical severity, CVSS 9.8 | Vulnix