CVE-2023-2673

PHOENIX CONTACT: FL/TC MGUARD prone to Improper Input Validation

MEDIUM
5.3
CVSS Score
Published: June 13, 2023 at 06:16 AM UTC
Updated: June 17, 2026 at 05:53 AM UTC
52 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 2102 by PHOENIX CONTACT?

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

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

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

v ≤ 10.1.1
phoenixcontact-fl-mguard-2102 (same device)
v ≤ 10.1.1
phoenixcontact-fl-mguard-4102-pci (same device)
v ≤ 10.1.1
phoenixcontact-fl-mguard-4102-pcie (same device)
v ≤ 10.1.1
phoenixcontact-fl-mguard-4302 (same device)
v ≤ 8.9.0
phoenixcontact-fl-mguard-centerport (same device)
v ≤ 8.9.0
phoenixcontact-fl-mguard-centerport-vpn-1000 (same device)
v ≤ 8.9.0
phoenixcontact-fl-mguard-core-tx (same device)
v ≤ 8.9.0
phoenixcontact-fl-mguard-core-tx-vpn (same device)
v ≤ 8.9.0
phoenixcontact-fl-mguard-delta-tx-tx (same device)
v ≤ 8.9.0
phoenixcontact-fl-mguard-delta-tx-tx-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

5.3MEDIUMCERTVDE
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-1287NVD-CWE-noinfo

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