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NVD / CVE Program· CNA CERTVDE

CVE-2023-2673: PHOENIX CONTACT: FL/TC MGUARD prone to Improper Input Validation

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.62% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.3 · v3.1—No exploit No fix recorded
Published
Jun 13, 2023
Updated
Jun 17, 2026
EPSS
0.6% · 49th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.6%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · CERTVDE
5.3
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2023-2673

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
phoenixcontactfl mguard 2102 firmware
phoenixcontactfl mguard 2102
phoenixcontactfl mguard 4102 pci firmware
phoenixcontactfl mguard 4102 pci
phoenixcontactfl mguard 4102 pcie firmware
phoenixcontactfl mguard 4102 pcie
phoenixcontactfl mguard 4302 firmware
phoenixcontactfl mguard 4302
phoenixcontactfl mguard centerport firmware
phoenixcontactfl mguard centerport
phoenixcontactfl mguard centerport vpn-1000 firmware
phoenixcontactfl mguard centerport vpn-1000

and 40 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • phoenixcontact fl mguard 2102 firmwareup to 10.1.1 inclusive
  • phoenixcontact fl mguard 4102 pci firmwareup to 10.1.1 inclusive
  • phoenixcontact fl mguard 4102 pcie firmwareup to 10.1.1 inclusive
  • phoenixcontact fl mguard 4302 firmwareup to 10.1.1 inclusive
  • phoenixcontact fl mguard centerport firmwareup to 8.9.0 inclusive
  • phoenixcontact fl mguard centerport vpn-1000 firmwareup to 8.9.0 inclusive
  • phoenixcontact fl mguard core tx firmwareup to 8.9.0 inclusive
  • phoenixcontact fl mguard core tx vpn firmwareup to 8.9.0 inclusive
  • phoenixcontact fl mguard delta tx/tx firmwareup to 8.9.0 inclusive
  • phoenixcontact fl mguard delta tx/tx vpn firmwareup to 8.9.0 inclusive
  • phoenixcontact fl mguard gt/gt firmwareup to 8.9.0 inclusive
  • phoenixcontact fl mguard gt/gt vpn firmwareup to 8.9.0 inclusive
  • phoenixcontact fl mguard pci4000 firmwareup to 8.9.0 inclusive
  • phoenixcontact fl mguard pci4000 vpn firmwareup to 8.9.0 inclusive
  • phoenixcontact fl mguard pcie4000 firmwareup to 8.9.0 inclusive
  • phoenixcontact fl mguard pcie4000 vpn firmwareup to 8.9.0 inclusive
  • phoenixcontact fl mguard rs2000 tx/tx vpn firmwareup to 8.9.0 inclusive
  • phoenixcontact fl mguard rs2000 tx/tx-b firmwareup to 8.9.0 inclusive
  • phoenixcontact fl mguard rs2005 tx vpn firmwareup to 8.9.0 inclusive
  • phoenixcontact fl mguard rs4000 tx/tx vpn firmwareup to 8.9.0 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (CERTVDE). Independent of NVD's CPE analysis and usually ahead of it.

  • PHOENIX CONTACT FL MGUARD 2102

    • up to and including 10.1.1affected · semver

  • PHOENIX CONTACT FL MGUARD 4102 PCI

    • up to and including 10.1.1affected · semver

  • PHOENIX CONTACT FL MGUARD 4102 PCIE

    • up to and including 10.1.1affected · semver

  • PHOENIX CONTACT FL MGUARD 4302

    • up to and including 10.1.1affected · semver

  • PHOENIX CONTACT FL MGUARD CENTERPORT

    • up to and including 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD CENTERPORT VPN-1000

    • up to and including 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD CORE TX

    • up to and including 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD CORE TX VPN

    • up to and including 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD DELTA TX/TX

    • up to and including 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD DELTA TX/TX VPN

    • up to and including 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD GT/GT

    • up to and including 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD GT/GT VPN

    • up to and including 8.9.0affected · semver

Same product

phoenixcontact: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-43384Phoenix Contact: Improper removal of sensitive information in MGUARD products
    32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
low · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
Low

Weakness class (CWE)

CWE-1287 · Improper Validation of Specified Type of Input

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records