CVE-2021-37915

Public Exploit

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.

8.8

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.77% Top 30%

Vendor Advisory grandstream.com

Affected: n/a n/a

References

Link	Tags
http://www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht801	product vendor advisory
http://firmware.grandstream.com/BETA/Release_Note_HT80x_1.0.29.8.pdf	broken link
https://www.secforce.com/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-37915/	third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-37915?: CVE-2021-37915 has been scored as a high severity vulnerability.
How to fix CVE-2021-37915?: To fix CVE-2021-37915, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-37915 being actively exploited in the wild?: It is possible that CVE-2021-37915 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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