CVE-2026-78446

HIGH

MEDIUM Priority: 0.04 BB Relevance: 55/100

Published: 2026-09-08 Modified: 2026-10-30 First seen: 2026-10-30 Status: active

Network No Interaction Conf. Impact Integ. Impact

AV: Network

AC: High

PR: Low

UI: None

S: Unchanged

C: High

I: High

A: High

Use after free in Windows Distributed File System (DFS) allows an authorized attacker to execute code over a network.

Vendor	Product	Version
Microsoft	Windows 10 Version 1607	10.0.14393.0 < 10.0.14393.9512
Microsoft	Windows 10 Version 1809	10.0.17763.0 < 10.0.17763.9245
Microsoft	Windows 10 Version 21H2	10.0.19044.0 < 10.0.19044.7725
Microsoft	Windows 10 Version 22H2	10.0.19045.0 < 10.0.19045.7725
Microsoft	Windows 11 Version 23H2	10.0.22631.0 < 10.0.22631.7582
Microsoft	Windows 11 Version 24H2	10.0.26100.0 < 10.0.26100.9445
Microsoft	Windows 11 Version 25H2	10.0.26200.0 < 10.0.26200.9445
Microsoft	Windows 11 version 23H2	10.0.22631.0 < 10.0.22631.7582
Microsoft	Windows 11 version 26H1	10.0.28000.0 < 10.0.28000.2954
Microsoft	Windows Server 2012	6.2.9200.0 < 6.2.9200.26349
Microsoft	Windows Server 2012 (Server Core installation)	6.2.9200.0 < 6.2.9200.26349
Microsoft	Windows Server 2012 R2	6.3.9600.0 < 6.3.9600.23398
Microsoft	Windows Server 2012 R2 (Server Core installation)	6.3.9600.0 < 6.3.9600.23398
Microsoft	Windows Server 2016	10.0.14393.0 < 10.0.14393.9512
Microsoft	Windows Server 2016 (Server Core installation)	10.0.14393.0 < 10.0.14393.9512
Microsoft	Windows Server 2019	10.0.17763.0 < 10.0.17763.9245
Microsoft	Windows Server 2019 (Server Core installation)	10.0.17763.0 < 10.0.17763.9245
Microsoft	Windows Server 2022	10.0.20348.0 < 10.0.20348.5622
Microsoft	Windows Server 2025	10.0.26100.0 < 10.0.26100.33438
Microsoft	Windows Server 2025 (Server Core installation)	10.0.26100.0 < 10.0.26100.33438

vendor-advisory patch

55 / 100

✓ Network accessible
✓ No user interaction

7.5 / 10.0 v3.1

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

0.48%

Raw Score 0.004760

Percentile 41.1%

Date 2026-10-30

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