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No exploitation reportedFix available

CVE-2021-37915

No exploitation reported by the sources we read.

  • Published2021-10-28
  • Fixed in1.0.29.8

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An issue was discovered on the Grandstream HT801 Analog Telephone Adaptor before 1.0.29.8. From the limited configuration shell, it is possible to set the malicious gdb_debug_server variable. As a result, after a reboot, the device downloads and executes malicious scripts from an attacker-defined host.

Timeline

dates in UTC
  1. 2021-10-2812:15CVE publishedNVD

Versions per branch

NVD
Grandstream ht801 firmwareversion to verify
BranchAffectedFixed in
1.0< 1.0.29.81.0.29.8

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Grandstream ht801 firmware to 1.0.29.8

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2021-10-28
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-mfhv-6c62-c8w2

Frequently asked questions

What is CVE-2021-37915?

An issue was discovered on the Grandstream HT801 Analog Telephone Adaptor before 1.0.29.8. From the limited configuration shell, it is possible to set the malicious gdb_debug_server variable. As a result, after a reboot, the device downloads and executes malicious scripts from an attacker-defined host.

Is CVE-2021-37915 actively exploited?

Active exploitation of CVE-2021-37915 has not been confirmed. Its EPSS score was 2.0% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-37915?

CVE-2021-37915 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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