CVE-2026-84854

Out of Bound Write on WibuKey for Windows

Published Oct 6, 2026 CVSS 3.1 · 7 High EPSS < 1% KEV · Not listed
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.

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 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.
Title Out of Bound Write on WibuKey for Windows
First Time appeared Wibu-systems-ag
Wibu-systems-ag wibukey
Weaknesses CWE-787
CPEs cpe:2.3:a:wibu-systems-ag:wibukey:*:*:*:*:*:*:*:*
Vendors & Products Wibu-systems-ag
Wibu-systems-ag wibukey
References
Metrics cvssV3_1

{'score': 7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
wibu
Published
Updated
Oct 15, 2026, 1:24 AM
Reserved
Sep 2, 2026, 1:16 PM
Status
Deferred
Published
Oct 6, 2026, 10:16 AM
Modified
Oct 15, 2026, 2:20 AM