Incorrect Conversion between Numeric Types in Windows and Windows Server - CVE-2026-26178
Published: April 15, 2026
Vulnerability identifier: #VU126134
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-26178
CWE-ID: CWE-681
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 attacker to escalate privileges on the system.
The vulnerability exists due to incorrect conversion between numeric types in Windows Advanced Rasterization Platform. A remote attacker can trick a victim to visit a website or open content that uses WebGL features and gain elevated privileges on the target system.
How to mitigate CVE-2026-26178
Install updates from vendor's website.