CVE tracker / CVE-2025-49666
CVE-2025-49666
CVE-2025-49666 is the Windows Server Setup and Boot Event Collection Remote Code Execution Vulnerability. Microsoft rates it Important, CVSS 7.2. It is not in CISA's Known Exploited Vulnerabilities catalog. Published July 8, 2025.
Risk summary
Microsoft describes it: “Heap-based buffer overflow in Windows Kernel allows an authorized attacker to execute code over a network.”
How to fix it
Microsoft lists 9 affected products and the update that fixes each:
- KB5062553 · fixed build 10.0.26100.4652
Windows Server 2025, Windows Server 2025 (Server Core installation) - KB5062557 · fixed build 10.0.17763.7558
Windows Server 2019 (Server Core installation), Windows Server 2019 - KB5062560 · fixed build 10.0.14393.8246
Windows Server 2016 (Server Core installation), Windows Server 2016 - KB5062570 · fixed build 10.0.25398.1732
Windows Server 2022, 23H2 Edition (Server Core installation) - KB5062572 · fixed build 10.0.20348.3932
Windows Server 2022 (Server Core installation), Windows Server 2022
What Microsoft changed
- July 8, 2025: Information published.
Details
- Weakness
- CWE-122: Heap-based Buffer Overflow
- Publicly disclosed (Microsoft)
- No
- Exploited (Microsoft)
- No
- Known exploited (CISA KEV)
- Not listed
- Published
- July 8, 2025
- Last revised
- July 8, 2025
Get told when this changes
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References
From Microsoft, CISA, NVD and FIRST data; the Microsoft details were read when this page was opened. Check the references above before you act.