{"id":"CVE-2020-5763","aliases":["EUVD-2020-26922","GHSA-h2gv-99w3-wrfr"],"status":"published","title":"Grandstream HT800 series firmware version 1.0.17.5 and below contain a backdoor in the SSH...","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.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.02726,"percentile":0.86164,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-326","CWE-489"],"published":"2020-07-29T18:51:50Z","modified":"2026-06-17T03:22:11Z","products":[{"vendor":"grandstream","product":"ht801_firmware"},{"vendor":"grandstream","product":"ht802_firmware"},{"vendor":"grandstream","product":"ht812_firmware"},{"vendor":"grandstream","product":"ht813_firmware"},{"vendor":"grandstream","product":"ht814_firmware"},{"vendor":"grandstream","product":"ht818_firmware"}],"references":[{"url":"https://www.tenable.com/security/research/tra-2020-43","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://www.tenable.com/security/research/tra-2020-47","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-5763"},{"url":"https://github.com/advisories/GHSA-h2gv-99w3-wrfr"}],"sources":{"cve":[{"id":"CVE-2020-5763","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.","status":"published","published":"2020-07-29T18:51:50Z","modified":"2024-08-04T08:39:25.821Z","cwes":["CWE-489"],"updated_at":"2026-11-02T14:35:47.56691Z"}],"euvd":[{"id":"EUVD-2020-26922","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.","status":"published","published":"2020-07-29T18:51:50Z","modified":"2024-08-04T08:39:25Z","updated_at":"2026-11-03T03:08:05.705852Z"}],"ghsa":[{"id":"GHSA-h2gv-99w3-wrfr","title":"Grandstream HT800 series firmware version 1.0.17.5 and below contain a backdoor in the SSH...","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.","status":"published","published":"2022-05-24T17:24:40Z","modified":"2023-01-29T05:03:26Z","updated_at":"2026-11-02T14:45:19.492424Z"}],"nvd":[{"id":"CVE-2020-5763","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.","status":"published","published":"2020-07-29T19:15:15.2Z","modified":"2026-06-17T03:22:11.423Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":9,"vector":"AV:N/AC:L/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-489","CWE-326"],"updated_at":"2026-11-02T14:06:10.994748Z"}]}}