CVE-2020-27631: Oryx-Embedded Cyclonetcp

Critical severity, CVSS 9.8. EPSS: 1.1% chance of exploitation in the next 30 days.

In Oryx CycloneTCP 1.9.6, TCP ISNs are improperly random.

Affected products

• Oryx-Embedded Cyclonetcp: version 1.9.6 only

Published 2023-10-10. Last modified 2026-06-17.