CVE-2021-33824: Moxa Mgate MB3180 Firmware

High severity, CVSS 7.5. EPSS: 1.9% chance of exploitation in the next 30 days.

An issue was discovered on MOXA Mgate MB3180 Version 2.1 Build 18113012. Attackers can use slowhttptest tool to send incomplete HTTP request, which could make server keep waiting for the packet to finish the connection, until its resource exhausted. Then the web server is denial-of-service.

Affected products

• Moxa Mgate MB3180 Firmware: version 2.1 only

Published 2021-06-18. Last modified 2026-06-17.