CVE-2021-27891

HIGH
Published Mar 15, 20215y ago · Modified Jun 17, 20262w ago
8.8 CVSS 3.1
High
Find Similar
Published Mar 15, 2021 5y ago
Last Modified Jun 17, 2026 2w ago

Description

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

CVSS Details

Base Score
8.8
Exploitability
2.8
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
No Patch Available

Affected Products 4

VendorProductVersionRange
sshtectia_client* <6.4.19
sshtectia_connectsecure*any
sshtectia_server* <6.4.19
microsoftwindows*any

References 1

  • info.ssh.com https://info.ssh.com/tectia-vulnerability-cve-2021-27891
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.