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Fencer Intel
high 7.0

CVE-2026-84854 json

Out of Bound Write on WibuKey for Windows

published last mo. modified 28d ago also EUVD-2026-93359

cvss
7.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits
0
none known

Summary

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.

Patch / fix

  • wibu-systems-ag wibukey 6.72
  • Siemens PSS(R)SINCAL V22.5 V22.5 Update 5

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-26-295-06 updated cvss 7.0

Siemens PSS(R)SINCAL

  • Siemens PSS(R)SINCAL V21.5 Siemens PSS(R)SINCAL V22.0
    affected: mitigation, no fix available
  • Siemens PSS(R)SINCAL V22.5 < 22.5.5
    affected: fixed in V22.5 simtec.cc

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
last mo.

Exploit prediction

0.11% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • wibu-systems-ag wibukey
  • Siemens PSS(R)SINCAL V21.5
  • Siemens PSS(R)SINCAL V22.0
  • Siemens PSS(R)SINCAL V22.5

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.