CVE-2026-81581

User input in WibuKey is used (without proper sanitization) to compute the address of a pointer, which can be exploited to let the user point to any storage, to which Windows responds with a denial of service.

Published Aug 27, 2026 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Description
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).

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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).
Title User input in WibuKey is used (without proper sanitization) to compute the address of a pointer, which can be exploited to let the user point to any storage, to which Windows responds with a denial of service.
First Time appeared Wibu-systems-ag
Wibu-systems-ag wibukey
Weaknesses CWE-119
CPEs cpe:2.3:a:wibu-systems-ag:wibukey:*:*:*:*:*:*:*:*
Vendors & Products Wibu-systems-ag
Wibu-systems-ag wibukey
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
wibu
Published
Updated
Aug 28, 2026, 3:55 AM
Reserved
Aug 27, 2026, 7:36 AM
Status
Deferred
Published
Aug 27, 2026, 10:16 AM
Modified
Sep 3, 2026, 5:49 PM