CVE-2025-49666 — Windows Server Setup and Boot Event Collection Remote Code Execution Vulnerability

Executive Summary

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

Overview

7.2

CVSS HIGH

Important

MS Severity

Not Exploited

MS Exploit Status

Exploitation Unlikely

MS Exploit Likelihood

Category Remote Code Execution

Released Jul 8 2025

Last Updated Jul 8 2025

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.01154 — 0.62858 percentile

NVD CVSS 7.2 HIGH — matches MSRC

CVSS 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

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 6.3

EPSS Score

0.01154

probability of exploitation in the next 30 days

0.62858 percentile - updated 2026-06-21

View on FIRST.org

Affected Products

9 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows Server 2016	`5062560 (Security Update)`	Important	Remote Code Execution	Yes
Windows Server 2016 (Server Core installation)	`5062560 (Security Update)`	Important	Remote Code Execution	Yes
Windows Server 2019	`5062557 (Security Update)`	Important	Remote Code Execution	Yes
Windows Server 2019 (Server Core installation)	`5062557 (Security Update)`	Important	Remote Code Execution	Yes
Windows Server 2022	`5062572 (Security Update)`	Important	Remote Code Execution	Yes
Windows Server 2022 (Server Core installation)	`5062572 (Security Update)`	Important	Remote Code Execution	Yes
Windows Server 2022, 23H2 Edition (Server Core installation)	`5062570 (Security Update)`	Important	Remote Code Execution	Yes
Windows Server 2025	`5062553 (Security Update)`	Important	Remote Code Execution	Yes
Windows Server 2025 (Server Core installation)	`5062553 (Security Update)`	Important	Remote Code Execution	Yes

Patches

5 patches

Article	Type	Restart
`5062560`	Security Update	Yes
`5062557`	Security Update	Yes
`5062572`	Security Update	Yes
`5062570`	Security Update	Yes
`5062553`	Security Update	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Anonymous

References

MSRC Advisory MITRE NVD