CVE-2018-3991
An exploitable heap overflow vulnerability exists in the WkbProgramLow function of WibuKey Network server management, version 6.40.2402.500.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 34.3%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 34.33% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- wibu/wibukey · siemens/simatic wincc open architecture
- Source
- talos-cna@cisco.com
EPSS 34.3% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/107005Third Party Advisory, VDB Entry
- https://cert-portal.siemens.com/productcert/pdf/ssa-760124.pdfMitigation, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-844562.pdfThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-902727.pdf
- https://talosintelligence.com/vulnerability_reports/TALOS-2018-0659Exploit, Third Party Advisory
- http://www.securityfocus.com/bid/107005Third Party Advisory, VDB Entry
- https://cert-portal.siemens.com/productcert/pdf/ssa-760124.pdfMitigation, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-844562.pdfThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-902727.pdf
- https://talosintelligence.com/vulnerability_reports/TALOS-2018-0659Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.