CVE-2025-49666

Windows Server Setup and Boot Event Collection Remote Code Execution Vulnerability

Description

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

References

Link	Tags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49666	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2025-49666?: CVE-2025-49666 has been scored as a high severity vulnerability.
How to fix CVE-2025-49666?: To fix CVE-2025-49666, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-49666 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-49666 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-49666?: CVE-2025-49666 affects Microsoft Windows Server 2019, Microsoft Windows Server 2019 (Server Core installation), Microsoft Windows Server 2022, Microsoft Windows Server 2025 (Server Core installation), Microsoft Windows Server 2022, 23H2 Edition (Server Core installation), Microsoft Windows Server 2025, Microsoft Windows Server 2016, Microsoft Windows Server 2016 (Server Core installation).

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.

Description

Category

CWE-122 – Heap-based Buffer Overflow

References

Frequently Asked Questions