CVE-2021-37915
An issue was discovered on the Grandstream HT801 Analog Telephone Adaptor before 1.0.29.8. From...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2021-37915- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 9.0 High
AV:N/AC:L/Au:S/C:C/I:C/A:C - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2021-37915- Updated
- 2026-11-02
EUVDEUVD-2021-24392 No score
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.
- Record
EUVD-2021-24392- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-mfhv-6c62-c8w2 No score
An issue was discovered on the Grandstream HT801 Analog Telephone Adaptor before 1.0.29.8. From...
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.
- Record
GHSA-mfhv-6c62-c8w2- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-37915 is a high vulnerability (CVSS 8.8) in Grandstream Ht801 Firmware, published October 28, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.03%, the 81st percentile. No source names a fixed version.
References
grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht801
firmware.grandstream.com/BETA/Release_Note_HT80x_1.0.29.8.pdf
secforce.com/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-37915
nvd.nist.gov/vuln/detail/CVE-2021-37915
github.com/advisories/GHSA-mfhv-6c62-c8w2