CVE-2026-81581

HIGH CVSS 3.1: 8.8 EPSS 0.22%
Updated Sep 03, 2026
Wibu-Systems-Ag
Parameter Value
CVSS 8.8 (HIGH)
Affected Versions 0 — 6.71
Fixed In 6.71
Type CWE-119 (Buffer Overflow)
Vendor Wibu-Systems-Ag
Public PoC No

Improper validation of memory boundaries in WibuKey64.sys of WibuKey up to 6.70 for Windows can be exploited by an attacker by setting the pointers outside the scope of the program. This usually results in a denial of service, yet we cannot rule out the possibility of exploits that can cause Remote Code Execution and Privilege Escalation (since the driver runs with system privileges).

Attack Parameters

Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

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

CVSS Vector v3.1

Weakness Type (CWE)

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Wibu-Systems-Ag Wibukey
cpe:2.3:a:wibu-systems-ag:wibukey:*:*:*:*:*:*:*:*
0 6.71