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CVE-2026-84854— Out of Bound Write on WibuKey for Windows

Quick assessment

Affected
wibu-systems-ag wibukey
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在适用于 Windows 的 WibuKey 驱动程序的低于 6.72 版本中，由于在计算内核缓冲区大小时对用户输入验证不足，可能导致少量数据被写入到预期内核缓冲区之外。这可能引发系统崩溃。在不利情况下，还可能修改相邻的内核内存。

CVSS 7.0 · High

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2026-84854

Vulnerability Information
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Vulnerability Title
Out of Bound Write on WibuKey for Windows
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
wibu-systems-ag wibukey 0 ~ 6.72 -

II. Public POCs for CVE-2026-84854

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III. Intelligence Information for CVE-2026-84854

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Other References for CVE-2026-84854 (1)

IV. Related Vulnerabilities

Same product: wibukey
Same vendor: wibu-systems-ag
Same weakness: CWE-787

V. Comments for CVE-2026-84854

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