Vulnerability · Published Oct 6, 2026 · Assigned by wibu
CVE-2026-84854Out of Bound Write on WibuKey for Windows
High 7.0
In plain English
A high-severity out-of-bounds write in wibukey from wibu-systems-ag. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities).
Severity (CVSS 3.1)7.0High
Exploit odds (30 days)0.1%top 98.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In the WibuKey driver for Windows below Version 6.72, insufficient validation of user input when calculating the size of a kernel buffer could cause small amounts of data to be written outside the intended kernel buffer. This can lead to a system crash. Under unfavorable circumstances, adjacent kernel memory may be modified.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| wibu-systems-ag | wibukey | 0 – before 6.72 |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H