VULNERABILITY INTELLIGENCE

CVE-2020-5763

CVSS score8.8 HIGH

EPSS probability2.73%

CISA KEVNot currently listed

Published2020-07-29

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

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.

Weakness classification

CWE-326: Inadequate Encryption Strength
CWE-489: Active Debug Code

Primary references

vulnreport@tenable.com — Exploit, Third Party Advisory
vulnreport@tenable.com — Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, VDB Entry