Vulnerability in Grandstream Ht801
CVE-2021-37915
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.020 (80.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
Public proof-of-concept exploits
References
- www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/produc… (Product, Vendor Advisory)
- firmware.grandstream.com/BETA/Release_Note_HT80x_1.0.29.8.pdf (Broken Link)
- www.secforce.com/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-37915?
- CVE-2021-37915 is a high-severity vulnerability in Grandstream Ht801. CVSS score: 8.8/10. Published 2021-10-28.
- How severe is CVE-2021-37915?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-37915 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.