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CVE-2026-26156

HIGH CVSS 3.1: 7.8
Updated Apr 17, 2026
Heap-based
Parameter Value
CVSS 7.8 (HIGH)
Type CWE-125 (Out-of-bounds Read), CWE-20 (Improper Input Validation), CWE-122 (Heap-based Buffer Overflow)
Vendor Heap-based
Public PoC No

Heap-based buffer overflow in Windows Hyper-V allows an unauthorized attacker to execute code 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