Heap-based buffer overflow in Windows and Windows Server - CVE-2025-47981
Published: July 9, 2025
Vulnerability identifier: #VU112674
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2025-47981
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows
Windows
Windows
Windows
Windows
Windows
Windows
Windows Server
Windows Server
Windows Server
Windows Server
Windows Server
Windows Server
Windows Server
Windows Server
Windows Server
Windows
Windows Server
Windows
Windows
Windows
Windows
Windows
Windows
Windows
Windows
Windows Server
Windows Server
Windows Server
Windows Server
Windows Server
Windows Server
Windows Server
Windows Server
Windows Server
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in SPNEGO Extended Negotiation (NEGOEX) Security Mechanism. A remote attacker can send a specially crafted message to the server, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2025-47981
Install updates from vendor's website.