CVE-2020-27630: Silabs Uc/tcp-IP

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

In Silicon Labs uC/TCP-IP 3.6.0, TCP ISNs are improperly random.

Affected products

• Silabs Uc/tcp-IP: version 3.6.0 only

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