CVE-2022-3480

Denial-of-Service vulnerability in PHOENIX CONTACT mGuard product family

HIGH
7.5
CVSS Score
Published: November 15, 2022 at 10:58 AM UTC
Updated: June 17, 2026 at 04:59 AM UTC
62 products affected across 1 vendorFl Mguard RS4004 Tx /dtx VPN FirmwareFl Mguard RS4004 Tx /dtx FirmwareFl Mguard RS4000 Tx /tx VPN Firmware

Using FL MGUARD CENTERPORT by PHOENIX CONTACT?

Get instant alerts when new vulnerabilities affect FL MGUARD CENTERPORT - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
HIGH7.5
Exploit prediction
EPSS 0.9%
SSVC
No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 8.9.0
Affected range stops below 8.9.0, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-mguard-centerport (same device)
v < 8.9.0
Affected range stops below 8.9.0, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-mguard-centerport-vpn-1000 (same device)
v < 8.9.0
Affected range stops below 8.9.0, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-mguard-core-tx (same device)
v < 8.9.0
Affected range stops below 8.9.0, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-mguard-core-tx-vpn (same device)
v < 8.9.0
Affected range stops below 8.9.0, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-mguard-delta-tx-tx (same device)
v < 8.9.0
Affected range stops below 8.9.0, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-mguard-delta-tx-tx-vpn (same device)
v < 8.9.0
Affected range stops below 8.9.0, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-mguard-gt-gt (same device)
v < 8.9.0
Affected range stops below 8.9.0, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-mguard-gt-gt-vpn (same device)
v < 8.9.0
Affected range stops below 8.9.0, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-mguard-pci4000 (same device)
v < 8.9.0
Affected range stops below 8.9.0, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-mguard-pci4000-vpn (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCERTVDE
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-770

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card