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.Referenceshttps://www.trustwave.com/en-us/resources/security-resources/security-advisories/?fid=23920&dl=1https://github.com/scarvell/grandstream_exploits
