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HIGH · 7.2

CVE-2025-49666

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

Vulnerability Description

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

CVSS Score

7.2

HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
MicrosoftWindows Server 2016< 10.0.14393.8246
MicrosoftWindows Server 2019< 10.0.17763.7558
MicrosoftWindows Server 2022< 10.0.20348.3932
MicrosoftWindows Server 2022 23H2< 10.0.25398.1732
MicrosoftWindows Server 2025< 10.0.26100.4652

Related Weaknesses (CWE)

CWE-122

References

FAQ

What is CVE-2025-49666?

CVE-2025-49666 is a vulnerability with a CVSS score of 7.2 (HIGH). Heap-based buffer overflow in Windows Kernel allows an authorized attacker to execute code over a network.

How severe is CVE-2025-49666?

CVE-2025-49666 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-49666?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022, Microsoft Windows Server 2022 23H2, Microsoft Windows Server 2025.