TI-2026-68403 Aliases CVE-2026-84854 GHSA-pc55-w49m-q7wf

Out-of-bounds write in WibuKey for Windows driver

LOW 32CWE-787Published 2026-10-06 · Updated 2026-10-15

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: High
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

The WibuKey driver for Windows before version 6.72 does not properly validate user input when calculating the size of a kernel buffer, so a local user with low privileges can write small amounts of data outside the intended kernel buffer (CWE-787). This can crash the system, and under unfavorable circumstances adjacent kernel memory may be modified.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00105 1st percentileScored 2026-11-07

Fix Fixed wibukey (wibu-systems-ag): 6.72

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
wibu-systems-ag	wibukey	before 6.72	6.72	Patch available	CNA

wibukey Vendorwibu-systems-ag Affected before 6.72 Fixed in 6.72 Patch available CNA

Remediation

Update WibuKey for Windows to version 6.72 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Fix · CNA wibukey (wibu-systems-ag) Fixed in 6.72

Timeline

2026-10-06 Threatist record created from CVE-2026-84854
2026-10-06 Alias added: GHSA-pc55-w49m-q7wf
2026-10-07 CISA SSVC decision points changed

References

Advisory 1

https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-100065.pdf

TI-2026-56280 Improper Access Control in Local-Only Configuration Commands CVSS 3.1HIGH 8.6
TI-2026-56281 Format String Vulnerability in Logger CVSS 3.1HIGH 8.2
TI-2026-56286 Memory corruption in wibu-systems-ag wibukey CVSS 3.1HIGH 8.8
TI-2026-56285 An untrusted Pointer Dereference can be exploited to escalate privileges by an unprivileged user on Windows CVSS 3.1HIGH 8.8
TI-2026-56279 Local Privilege Escalation in CodeMeter Runtime on Windows CVSS 3.1HIGH 7.8
TI-2026-56283 Improper Authentication of Session Handles CVSS 3.1HIGH 7.7

See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences