CVE-2021-21004: Phoenixcontact Fl Nat Smn 8tx-M Firmware

Medium severity, CVSS 6.1. EPSS: 0.6% chance of exploitation in the next 30 days.

In Phoenix Contact FL SWITCH SMCS series products in multiple versions an attacker may insert malicious code via LLDP frames into the web-based management which could then be executed by the client.

Affected products

• Phoenixcontact Fl Nat Smn 8tx-M Firmware: up to and including 4.63
• Phoenixcontact Fl Nat Smn 8tx Firmware: up to and including 4.63
• Phoenixcontact Fl Switch Smcs 14tx/2fx-Sm Firmware: up to and including 4.70
• Phoenixcontact Fl Switch Smcs 14tx/2fx Firmware: up to and including 4.70
• Phoenixcontact Fl Switch Smcs 16tx Firmware: up to and including 4.70
• Phoenixcontact Fl Switch Smcs 4tx-Pn Firmware: up to and including 4.70
• Phoenixcontact Fl Switch Smcs 6gt/2sfp Firmware: up to and including 4.70
• Phoenixcontact Fl Switch Smcs 6tx/2sfp Firmware: up to and including 4.70
• Phoenixcontact Fl Switch Smcs 8gt Firmware: up to and including 4.70
• Phoenixcontact Fl Switch Smcs 8tx-Pn Firmware: up to and including 4.70
• Phoenixcontact Fl Switch Smcs 8tx Firmware: up to and including 4.70
• Phoenixcontact Fl Switch Smn 6tx/2fx Firmware: up to and including 4.70
• Phoenixcontact Fl Switch Smn 6tx/2fx Sm Firmware: up to and including 4.70
• Phoenixcontact Fl Switch Smn 6tx/2pof-Pn Firmware: up to and including 4.70
• Phoenixcontact Fl Switch Smn 8tx-Pn Firmware: up to and including 4.70

Published 2021-06-25. Last modified 2026-06-17.