Usage of static SSH host key in Cisco Umbrella Virtual Appliance

Published: 2022-04-21
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-20773
Exploitation vector Local network
Public exploit N/A
Vulnerable software
Cisco Umbrella Virtual Appliance
Server applications / Virtualization software

Vendor Cisco Systems, Inc

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Use of Hard-coded Cryptographic Key

EUVDB-ID: #VU62464

Risk: High


CVE-ID: CVE-2022-20773

CWE-ID: CWE-321 - Use of Hard-coded Cryptographic Key

Exploit availability: No


The vulnerability allows a remote attacker to impersonate the virtual appliance.

The vulnerability exists due to the presence of a static SSH host key. A remote attacker can perform a man-in-the-middle (MitM) attack on an SSH connection to the Umbrella VA.


Install updates from vendor's website.

Vulnerable software versions

Cisco Umbrella Virtual Appliance: 3.0.0 - 3.3.1

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?