Vulnerability · Published Oct 28, 2021 · Assigned by mitre

CVE-2021-37915

High 8.8

In plain English

A high-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.0% (higher than 81% of all known vulnerabilities).

Severity (CVSS NVD)8.8High

Exploit odds (30 days)2.0%top 18.9% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

References

http://www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht801 x_refsource_MISC
http://firmware.grandstream.com/BETA/Release_Note_HT80x_1.0.29.8.pdf x_refsource_MISC
https://www.secforce.com/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-37915/ x_refsource_MISC