CVE-2021-37915 json
An issue was discovered on the Grandstream HT801 Analog Telephone Adaptor before 1.0.29.8.
published 5y ago modified 4mo ago also EUVD-2021-24392
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.0%
- EPSS 2.0% chance of exploitation in 30 days, percentile 81%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- grandstream ht801_firmware 1.0.29.8
Is CVE-2021-37915 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
2.03% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- secforce.com https://www.secforce.com/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-37915/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 9.0 | AV:N/AC:L/Au:S/C:C/I:C/A:C |
References
-
secforce.com
/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-37915/
exploit, third-party-advisory
-
grandstream.com
/products/gateways-and-atas/analog-telephone-adaptors/product/ht801
product, vendor-advisory
-
firmware.grandstream.com
/BETA/Release_Note_HT80x_1.0.29.8.pdf
broken-link
Sources
- CVE List CVE-2021-37915
- NVD CVE-2021-37915
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