CVE-2021-37915
highpriority · track · 36EPSS 0.020 · 81 %ileEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (9)
External citations — patches, advisories, analysis.
- http://firmware.grandstream.com/BETA/Release_Note_HT80x_1.0.29.8.pdfcnnvd
- http://www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht801cnnvd
- https://www.secforce.com/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-37915/cnnvd
- http://firmware.grandstream.com/BETA/Release_Note_HT80x_1.0.29.8.pdfenisa_euvd
- http://www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht801enisa_euvd
- https://www.secforce.com/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-37915/enisa_euvd
- http://firmware.grandstream.com/BETA/Release_Note_HT80x_1.0.29.8.pdfBroken Linknvd
- http://www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht801ProductVendor Advisorynvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan