CVE-2023-2673: Phoenixcontact Fl Mguard 2102 Firmware

Medium severity, CVSS 5.3. EPSS: 0.6% chance of exploitation in the next 30 days.

Improper Input Validation vulnerability in PHOENIX CONTACT FL/TC MGUARD Family in multiple versions may allow UDP packets to bypass the filter rules and access the solely connected device behind the MGUARD which can be used for flooding attacks.

Affected products

• Phoenixcontact Fl Mguard 2102 Firmware: up to and including 10.1.1
• Phoenixcontact Fl Mguard 4102 Pci Firmware: up to and including 10.1.1
• Phoenixcontact Fl Mguard 4102 Pcie Firmware: up to and including 10.1.1
• Phoenixcontact Fl Mguard 4302 Firmware: up to and including 10.1.1
• Phoenixcontact Fl Mguard Centerport Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard Centerport VPN-1000 Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard Core Tx Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard Core Tx VPN Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard Delta Tx/tx Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard Delta Tx/tx VPN Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard Gt/gt Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard Gt/gt VPN Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard PCI4000 Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard PCI4000 VPN Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard PCIE4000 Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard PCIE4000 VPN Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard RS2000 Tx/tx-B Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard RS2000 Tx/tx VPN Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard RS2005 Tx VPN Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard RS4000 Tx/tx-M Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard RS4000 Tx/tx-P Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard RS4000 Tx/tx VPN Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard RS4004 Tx/dtx Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard RS4004 Tx/dtx VPN Firmware: up to and including 8.9.0
• Phoenixcontact Fl Mguard SMART2 Firmware: up to and including 8.9.0
• and 1 more

Published 2023-06-13. Last modified 2026-06-17.