CVE-2026-81581
High
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).
SeverityHigh
CVSS8.8
Exploit probability12. percentile0.2%
ProductWibu-systems-ag Wibukey
PublishedAug 27, 2026
First seenAug 27, 2026
Weakness typeCWE-119Memory buffer bounds error
How to fix
Update
- wibu-systems-ag wibukey6.71 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| wibu-systems-ag wibukey | v < 6.71 | 6.71 |
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