CVE-2018-3991: Critical severity wibukey vulnerability

Published Feb 5, 2019
·
Updated

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.

Affected Software

5 affected components
Wibu WibuKey=6.40.2402.500
Microsoft Windows
Siemens Simatic Wincc Open Architecture=3.14
Siemens Simatic Wincc Open Architecture=3.15
Siemens Simatic Wincc Open Architecture=3.16

Event History

Feb 5, 2019
CVE Published
via MITRE·10:00 PM
Data Sourced
via MITRE·10:00 PM
DescriptionSeverity
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is CVE-2018-3991?

CVE-2018-3991 is an exploitable heap overflow vulnerability in the WkbProgramLow function of WibuKey Network server management, version 6.40.2402.500.

2

How severe is CVE-2018-3991?

CVE-2018-3991 has a severity score of 9.8 (Critical).

3

How can CVE-2018-3991 be exploited?

CVE-2018-3991 can be exploited by sending a specially crafted TCP packet to trigger a heap overflow, potentially leading to remote code execution.

4

Which software versions are affected by CVE-2018-3991?

CVE-2018-3991 affects WibuKey Network server management version 6.40.2402.500.

5

Is Microsoft Windows affected by CVE-2018-3991?

No, Microsoft Windows is not affected by CVE-2018-3991.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203