CVE-2022-3480: Phoenixcontact Fl Mguard Centerport Firmware
High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.
A remote, unauthenticated attacker could cause a denial-of-service of PHOENIX CONTACT FL MGUARD and TC MGUARD devices below version 8.9.0 by sending a larger number of unauthenticated HTTPS connections originating from different source IP’s. Configuring firewall limits for incoming connections cannot prevent the issue.
Affected products
- Phoenixcontact Fl Mguard Centerport Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard Centerport VPN-1000 Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard Core Tx Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard Core Tx VPN Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard Delta Tx/tx Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard Delta Tx/tx VPN Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard Gt/gt Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard Gt/gt VPN Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard PCI4000 Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard PCI4000 VPN Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard PCIE4000 Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard PCIE4000 VPN Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard RS2000 Tx/tx-B Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard RS2000 Tx/tx VPN Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard RS2005 Tx VPN Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard RS4000 Tx/tx-M Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard RS4000 Tx/tx-P Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard RS4000 Tx/tx Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard RS4000 Tx/tx VPN Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard RS4004 Tx/dtx Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard RS4004 Tx/dtx VPN Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard SMART2 Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Fl Mguard SMART2 VPN Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Tc Mguard RS2000 3g VPN Firmware: before 8.9.0 (fixed in 8.9.0)
- Phoenixcontact Tc Mguard RS2000 4g Att VPN Firmware: before 8.9.0 (fixed in 8.9.0)
- and 6 more
Published 2022-11-15. Last modified 2026-06-17.