Integer overflow in Windows and Windows Server - CVE-2026-50298
Published: July 17, 2026
Vulnerability identifier: #VU137984
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-50298
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows Server
Detailed vulnerability description
The vulnerability allows an attacker with physical access to escalate privileges.
The vulnerability exists due to integer overflow or wraparound in Windows Spaceport.sys when processing crafted input through physical access to the system. An attacker with physical access can trigger the flaw to escalate privileges.
Successful exploitation could allow the attacker to obtain SYSTEM privileges.
How to mitigate CVE-2026-50298
Install security update from vendor's website.