CVE-2018-5455: Moxa Oncell g3110-Hspa-T Firmware

Critical severity, CVSS 9.8. EPSS: 1.6% chance of exploitation in the next 30 days.

A Reliance on Cookies without Validation and Integrity Checking issue was discovered in Moxa OnCell G3100-HSPA Series version 1.4 Build 16062919 and prior. The application allows a cookie parameter to consist of only digits, allowing an attacker to perform a brute force attack bypassing authentication and gaining access to device functions.

Affected products

• Moxa Oncell g3110-Hspa-T Firmware: up to and including 1.4
• Moxa Oncell g3110-Hspa Firmware: up to and including 1.4
• Moxa Oncell g3150-Hspa-T Firmware: up to and including 1.4
• Moxa Oncell g3150-Hspa Firmware: up to and including 1.4

Published 2018-03-05. Last modified 2026-06-17.