Vulnerability · Published Jul 8, 2025 · Assigned by microsoft
CVE-2025-49666Windows Server Setup and Boot Event Collection Remote Code Execution Vulnerability
High 7.2
In plain English
A high-severity heap buffer overflow in Windows Server 2016 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 73% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Severity (CVSS 3.1)7.2High
Exploit odds (30 days)1.4%top 27.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official description
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to execute code over a network.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows Server 2016 | 10.0.14393.0 – before 10.0.14393.8246 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 – before 10.0.14393.8246 |
| Microsoft | Windows Server 2019 | 10.0.17763.0 – before 10.0.17763.7558 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 – before 10.0.17763.7558 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – before 10.0.20348.3932 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 – before 10.0.25398.1732 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – before 10.0.26100.4652 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – before 10.0.26100.4652 |
Weakness: CWE-122 · 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
References
- Windows Server Setup and Boot Event Collection Remote Code Execution Vulnerability vendor-advisory, patch