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CVE-2026-26143

HIGH CVSS 3.1: 7.8
Updated Apr 17, 2026
Microsoft
Parameter Value
CVSS 7.8 (HIGH)
Type CWE-20 (Improper Input Validation)
Vendor Microsoft
Public PoC No

Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.

Attack Parameters

Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1