External Control of File Name or Path in Cisco Unified Communications Products

Published: 2022-04-21
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-20789
Exploitation vector Network
Public exploit N/A
Vulnerable software
Cisco Unified Communications Manager
Server applications / Other server solutions

Cisco Unified Communications Manager Session Management Edition
Server applications / Remote management servers, RDP, SSH

Vendor Cisco Systems, Inc

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) External Control of File Name or Path

EUVDB-ID: #VU62477

Risk: Low

CVSSv3.1: 4.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-20789

CWE-ID: CWE-73 - External Control of File Name or Path

Exploit availability: No


The vulnerability allows a user attacker to write arbitrary files.

The vulnerability exists due to improper restrictions applied to a system script in the software upgrade process. A remote administrator can use specially crafted variables during the execution of a system upgrade and write arbitrary files on the system.


Install updates from vendor's website.

Vulnerable software versions

Cisco Unified Communications Manager: 12.5(1) - 14.0

Cisco Unified Communications Manager Session Management Edition: 12.5.1 - 14.0

CPE2.3 External links


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.