CVE-2026-44805

Windows Network Controller (NC) Host Agent Denial of Service Vulnerability

State: Published
Severity: 5.5 Medium
Published: Jun 9, 2026
Updated: Sep 24, 2026
Reserved: May 7, 2026

Description

Use after free in Windows Network Controller (NC) Host Agent allows an authorized attacker to deny service locally.

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-416 Use After Free
CWE-822 Untrusted Pointer Dereference

Affected Products

Product	Versions
Windows Server 2019Microsoft	10.0.17763.0 to before 10.0.17763.8880Affected
Windows Server 2019 (Server Core installation)Microsoft	10.0.17763.0 to before 10.0.17763.8880Affected
Windows Server 2022Microsoft	10.0.20348.0 to before 10.0.20348.5256Affected
Windows Server 2025Microsoft	10.0.26100.0 to before 10.0.26100.32995Affected
Windows Server 2025 (Server Core installation)Microsoft	10.0.26100.0 to before 10.0.26100.32995Affected

References

Windows Network Controller (NC) Host Agent Denial of Service Vulnerabilityvendor-advisorypatch

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