CVE-2021-27891: SSH Tectia Client

High severity, CVSS 8.8. EPSS: 1.1% chance of exploitation in the next 30 days.

SSH Tectia Client and Server before 6.4.19 on Windows have weak key generation. ConnectSecure on Windows is affected.

Affected products

• SSH Tectia Client: before 6.4.19 (fixed in 6.4.19)
• SSH Tectia Connectsecure: affected versions not specified
• SSH Tectia Server: before 6.4.19 (fixed in 6.4.19)

Published 2021-03-15. Last modified 2026-06-17.