Buffer overflow in Wibu-Systems-Ag Wibukey
CVE-2026-84854
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- 2fc02b1f-71e7-4514-a878-169626f68903 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-84854?
- CVE-2026-84854 is a high-severity vulnerability in Wibu-Systems-Ag Wibukey, classified under Out-of-bounds Write. CVSS score: 7.0/10. Published 2026-10-06.
- How severe is CVE-2026-84854?
- High severity. CVSS v3 base score is 7.0 out of 10.