Main Vulnerability Database Vulnerabilities #VU122602

Improper Handling of Missing Special Element in Microsoft products - CVE-2026-21218

Published: February 10, 2026

Vulnerability identifier: #VU122602

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2026-21218

CWE-ID: CWE-166

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: Microsoft

Affected software:
.NET for Linux
.NET for macOS
.NET

Detailed vulnerability description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to improper handling of missing special element in .NET. A remote attacker can perform spoofing attack on the system.

Install updates from vendor's website.