CVE-2020-5763

highpriority · track · 36OT risk · elevatedEPSS 0.027 · 86 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

2.73% (86th) EPSS

CVSS 9 · high

Is it mine?

7 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-28

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.

cvss

Technical severity, 0–10. One row per scoring source.

9.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.09highAV:N/AC:L/Au:S/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 8 · impact 10

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-326USprimaryCWE-489US

affected products (7)

Products and version ranges known to be affected.

n/a Grandstream HT800 Series≤ Versions 1.0.17.5 and belowenisa_euvdEU
grandstream ht801 firmware≤ 1.0.17.5nvdUScpe:2.3:o:grandstream:ht801_firmware:*:*:*:*:*:*:*:*
grandstream ht802 firmware≤ 1.0.17.5nvdUScpe:2.3:o:grandstream:ht802_firmware:*:*:*:*:*:*:*:*
grandstream ht812 firmware≤ 1.0.17.5nvdUScpe:2.3:o:grandstream:ht812_firmware:*:*:*:*:*:*:*:*
grandstream ht813 firmware≤ 1.0.17.5nvdUScpe:2.3:o:grandstream:ht813_firmware:*:*:*:*:*:*:*:*
grandstream ht814 firmware≤ 1.0.17.5nvdUScpe:2.3:o:grandstream:ht814_firmware:*:*:*:*:*:*:*:*
grandstream ht818 firmware≤ 1.0.17.5nvdUScpe:2.3:o:grandstream:ht818_firmware:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2020-07-29modified 2026-06-17

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+692 more

references (8)

External citations — patches, advisories, analysis.

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