Grandstream HT800 series firmware version 1.0.17.5 and below contain a backdoor in the SSH service. An authenticated remote attacker can obtain a root shell by correctly answering a challenge prompt.
https://www.tenable.com/security/research/tra-2020-47
https://www.tenable.com/security/research/tra-2020-43
Source: Mitre, NVD
Published: 2020-07-29
Updated: 2020-07-31
Base Score: 9
Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C
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