CVE-2021-27893

Severity: high (CVSS 7.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-15 · updated 2026-06-17

Description

SSH Tectia Client and Server before 6.4.19 on Windows allow local privilege escalation in nonstandard conditions. ConnectSecure on Windows is affected.

Affected products

SSH Tectia Client: before 6.4.19 — fixed in 6.4.19
SSH Tectia Connectsecure: all versions
SSH Tectia Server: before 6.4.19 — fixed in 6.4.19

How to fix

Upgrade to a fixed version: SSH Tectia Client 6.4.19; SSH Tectia Server 6.4.19. Check the vendor advisory for mitigations.

References

https://info.ssh.com/tectia-vulnerability-cve-2021-27893
https://info.ssh.com/tectia-vulnerability-cve-2021-27893

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