An exploitable heap overflow vulnerability exists in the WkbProgramLow function of…
Priority HIGH 68CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
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.
Why it matters now
EPSS 0.34329 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:wibu:wibukey:6.40.2402.500:*:*:*:*:*:*:* | 6.40.2402.500 | Vulnerable | Wibu |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
| cpe:2.3:o:siemens:simatic_wincc_open_architecture:3.14:*:*:*:*:*:*:* | 3.14 | Vulnerable | Siemens |
| cpe:2.3:o:siemens:simatic_wincc_open_architecture:3.15:*:*:*:*:*:*:* | 3.15 | Vulnerable | Siemens |
| cpe:2.3:o:siemens:simatic_wincc_open_architecture:3.16:*:*:*:*:*:*:* | 3.16 | Vulnerable | Siemens |
- cpe:2.3:a:wibu:wibukey:6.40.2402.500:*:*:*:*:*:*:* Versions 6.40.2402.500 Vulnerable ·Wibu
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
- cpe:2.3:o:siemens:simatic_wincc_open_architecture:3.14:*:*:*:*:*:*:* Versions 3.14 Vulnerable ·Siemens
- cpe:2.3:o:siemens:simatic_wincc_open_architecture:3.15:*:*:*:*:*:*:* Versions 3.15 Vulnerable ·Siemens
- cpe:2.3:o:siemens:simatic_wincc_open_architecture:3.16:*:*:*:*:*:*:* Versions 3.16 Vulnerable ·Siemens
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-3991
- 2026-10-03 Alias added: GHSA-wqfw-3h2h-7vwc
References
Sources
- CVE-2018-3991 · CVE Program
- CVE-2018-3991 · NVD
- FIRST EPSS
- GHSA-wqfw-3h2h-7vwc · GitHub Advisory Database · CC BY 4.0
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