CVE-2021-39279: Moxa Oncell g3470a-Lte-Eu-T Firmware

High severity, CVSS 8.8. EPSS: 4.6% chance of exploitation in the next 30 days.

Certain MOXA devices allow Authenticated Command Injection via /forms/web_importTFTP. This affects WAC-2004 1.7, WAC-1001 2.1, WAC-1001-T 2.1, OnCell G3470A-LTE-EU 1.7, OnCell G3470A-LTE-EU-T 1.7, TAP-323-EU-CT-T 1.3, TAP-323-US-CT-T 1.3, TAP-323-JP-CT-T 1.3, WDR-3124A-EU 2.3, WDR-3124A-EU-T 2.3, WDR-3124A-US 2.3, and WDR-3124A-US-T 2.3.

Affected products

• Moxa Oncell g3470a-Lte-Eu-T Firmware: version 1.7 only
• Moxa Oncell g3470a-Lte-Eu Firmware: version 1.7 only
• Moxa Tap-323-Eu-Ct-T Firmware: version 1.3 only
• Moxa Tap-323-Jp-Ct-T Firmware: version 1.3 only
• Moxa Tap-323-Us-Ct-T Firmware: version 1.3 only
• Moxa Wac-1001-T Firmware: version 2.1 only
• Moxa Wac-1001 Firmware: version 2.1 only
• Moxa Wac-2004 Firmware: version 1.7 only
• Moxa Wdr-3124a-Eu-T Firmware: version 2.3 only
• Moxa Wdr-3124a-Eu Firmware: version 2.3 only
• Moxa Wdr-3124a-Us-T Firmware: version 2.3 only
• Moxa Wdr-3124a-Us Firmware: version 2.3 only

Published 2021-09-07. Last modified 2026-06-17.