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Fencer Intel
critical 10.0

CVE-2018-3991 in the critical feed json

An exploitable heap overflow vulnerability exists in the WkbProgramLow function of WibuKey Network server management, version 6.40.2402.500.

published 7y ago modified 4mo ago also EUVD-2018-15777

cvss
10.0
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
34.3%
EPSS 34.3% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

An exploitable heap overflow vulnerability exists in the WkbProgramLow function of WibuKey Network server management, version 6.40.2402.500. A specially crafted TCP packet can cause a heap overflow, potentially leading to remote code execution. An attacker can send a malformed TCP packet to trigger this vulnerability.

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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-19-043-03 updated cvss 10.0

WIBU SYSTEMS AG WibuKey Digital Rights Management (Update D)

  • WIBU-SYSTEMS AG COPA-DATA straton workbench <= 9.2 WIBU-SYSTEMS AG COPA-DATA zenon products <= 7.20 (7.50 and 7.60 may also be affected if WibuKey was installed manually) WIBU-SYSTEMS AG Phoenix Contact MEVIEW3 <= 3.14.25, 3.15.18 WIBU-SYSTEMS AG Siemens SICAM 230 <= 7.20 WIBU-SYSTEMS AG Siemens SIMATIC WinCC OA 3.14 < P025 WIBU-SYSTEMS AG Siemens SIMATIC WinCC OA 3.15 < P018
    +3 more products
    WIBU-SYSTEMS AG Siemens SIMATIC WinCC OA 3.16 < P007 WIBU-SYSTEMS AG Siemens SISHIP EMCS IMAC IPMS WIBU-SYSTEMS AG Sprecher Automation SPRECON-V460 products <= 7.20 (7.50 and 7.60 may also be affected if WibuKey was installed manually)
    affected: fixed in 6.50a winccoa.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

34.33% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • talosintelligence.com https://talosintelligence.com/vulnerability_reports/TALOS-2018-0659 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 10.0 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

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.