Heap-based buffer overflow in Windows and Windows Server - CVE-2026-49178
Published: July 17, 2026
Vulnerability identifier: #VU137962
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-49178
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows Server
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary code.
The vulnerability exists due to a heap-based buffer overflow in the NSPI RPC interface in Active Directory Domain Services when processing crafted inputs. A remote user can send crafted RPC inputs to execute arbitrary code.
Exploitation requires domain authentication and does not require user interaction.
How to mitigate CVE-2026-49178
Install security update from vendor's website.