Grandstream UCM6204 before 1.0.19.20 devices allow remote authenticated users to execute arbitrary code via shell metacharacters in the backupUCMConfig file-backup parameter to the /cgi? URI.
https://github.com/scarvell/grandstream_exploits
https://www.trustwave.com/en-us/resources/security-resources/security-advisories/?fid=23920&dl=1
Source: MITRE
Published: 2019-03-30
Updated: 2020-08-24
Type: CWE-78
Base Score: 9
Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C
Impact Score: 10
Exploitability Score: 8
Severity: HIGH
Base Score: 8.8
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 2.8
Severity: HIGH