CVE-2025-49666

Published: Jul 8, 2025

Modified: Feb 13, 2026

PUBLISHED

CVSS v3.1

7.2

HIGH

Heap-based buffer overflow in Windows Kernel allows an authorized attacker to execute code over a network.

Vendor	Product	Versions
Microsoft	Windows Server 2016	affected `10.0.14393.0 - < 10.0.14393.8246`
Microsoft	Windows Server 2016 (Server Core installation)	affected `10.0.14393.0 - < 10.0.14393.8246`
Microsoft	Windows Server 2019	affected `10.0.17763.0 - < 10.0.17763.7558`
Microsoft	Windows Server 2019 (Server Core installation)	affected `10.0.17763.0 - < 10.0.17763.7558`
Microsoft	Windows Server 2022	affected `10.0.20348.0 - < 10.0.20348.3932`
Microsoft	Windows Server 2022, 23H2 Edition (Server Core installation)	affected `10.0.25398.0 - < 10.0.25398.1732`
Microsoft	Windows Server 2025	affected `10.0.26100.0 - < 10.0.26100.4652`
Microsoft	Windows Server 2025 (Server Core installation)	affected `10.0.26100.0 - < 10.0.26100.4652`

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

vendor-advisory

patch

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