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Noroxi
CVE-2022-3480· NVD / CVE Program· CNA CERTVDE

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

Noroxi assessment

Priority: Monitor (action score 30/100)

  • 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: 0.90% (FIRST EPSS); higher than 58.8% of all records.
  • 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.
  • Fixed version: PHOENIX CONTACT FL MGUARD CENTERPORT 8.9.0; PHOENIX CONTACT FL MGUARD CENTERPORT VPN-1000 8.9.0; PHOENIX CONTACT FL MGUARD CORE TX 8.9.0.

Low priority for now. Upgrade to PHOENIX CONTACT FL MGUARD CENTERPORT 8.9.0; PHOENIX CONTACT FL MGUARD CENTERPORT VPN-1000 8.9.0; PHOENIX CONTACT FL MGUARD CORE TX 8.9.0 or later.

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

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.

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
Nov 15, 2022
Updated
Jun 17, 2026
EPSS
0.9% · 59th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.9%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · CERTVDE
7.5
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
  • A fix has been released

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

Follow CVE-2022-3480

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

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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 centerport firmware
phoenixcontactfl mguard centerport
phoenixcontactfl mguard centerport vpn-1000 firmware
phoenixcontactfl mguard centerport vpn-1000
phoenixcontactfl mguard core tx firmware
phoenixcontactfl mguard core tx
phoenixcontactfl mguard core tx vpn firmware
phoenixcontactfl mguard core tx vpn
phoenixcontactfl mguard delta tx\/tx firmware
phoenixcontactfl mguard delta tx\/tx
phoenixcontactfl mguard delta tx\/tx vpn firmware
phoenixcontactfl mguard delta tx\/tx vpn

and 50 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 centerport firmwarebefore 8.9.0
  • phoenixcontact fl mguard centerport vpn-1000 firmwarebefore 8.9.0
  • phoenixcontact fl mguard core tx firmwarebefore 8.9.0
  • phoenixcontact fl mguard core tx vpn firmwarebefore 8.9.0
  • phoenixcontact fl mguard delta tx/tx firmwarebefore 8.9.0
  • phoenixcontact fl mguard delta tx/tx vpn firmwarebefore 8.9.0
  • phoenixcontact fl mguard gt/gt firmwarebefore 8.9.0
  • phoenixcontact fl mguard gt/gt vpn firmwarebefore 8.9.0
  • phoenixcontact fl mguard pci4000 firmwarebefore 8.9.0
  • phoenixcontact fl mguard pci4000 vpn firmwarebefore 8.9.0
  • phoenixcontact fl mguard pcie4000 firmwarebefore 8.9.0
  • phoenixcontact fl mguard pcie4000 vpn firmwarebefore 8.9.0
  • phoenixcontact fl mguard rs2000 tx/tx vpn firmwarebefore 8.9.0
  • phoenixcontact fl mguard rs2000 tx/tx-b firmwarebefore 8.9.0
  • phoenixcontact fl mguard rs2005 tx vpn firmwarebefore 8.9.0
  • phoenixcontact fl mguard rs4000 tx/tx firmwarebefore 8.9.0
  • phoenixcontact fl mguard rs4000 tx/tx vpn firmwarebefore 8.9.0
  • phoenixcontact fl mguard rs4000 tx/tx-m firmwarebefore 8.9.0
  • phoenixcontact fl mguard rs4000 tx/tx-p firmwarebefore 8.9.0
  • phoenixcontact fl mguard rs4004 tx/dtx firmwarebefore 8.9.0

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 CENTERPORT

    • before 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD CENTERPORT VPN-1000

    • before 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD CORE TX

    • before 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD CORE TX VPN

    • before 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD DELTA TX/TX

    • before 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD DELTA TX/TX VPN

    • before 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD GT/GT

    • before 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD GT/GT VPN

    • before 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD PCI4000

    • before 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD PCI4000 VPN

    • before 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD PCIE4000

    • before 8.9.0affected · semver

  • PHOENIX CONTACT FL MGUARD PCIE4000 VPN

    • before 8.9.0affected · semver

Remediation

Which version to upgrade to

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

Product / packageFixed versionSource
PHOENIX CONTACT FL MGUARD CENTERPORT8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD CENTERPORT VPN-10008.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD CORE TX8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD CORE TX VPN8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD DELTA TX/TX8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD DELTA TX/TX VPN8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD GT/GT8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD GT/GT VPN8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD PCI40008.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD PCI4000 VPN8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD PCIE40008.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD PCIE4000 VPN8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD RS2000 TX/TX VPN8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD RS2000 TX/TX-B8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD RS2005 TX VPN8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD RS4000 TX/TX8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD RS4000 TX/TX VPN8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD RS4000 TX/TX-M8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD RS4000 TX/TX-P8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD RS4004 TX/DTX8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD RS4004 TX/DTX VPN8.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD SMART28.9.0Vendor (CNA)
PHOENIX CONTACT FL MGUARD SMART2 VPN8.9.0Vendor (CNA)
PHOENIX CONTACT TC MGUARD RS2000 3G VPN8.9.0Vendor (CNA)
PHOENIX CONTACT TC MGUARD RS2000 4G ATT VPN8.9.0Vendor (CNA)
PHOENIX CONTACT TC MGUARD RS2000 4G VPN8.9.0Vendor (CNA)
PHOENIX CONTACT TC MGUARD RS2000 4G VZW VPN8.9.0Vendor (CNA)
PHOENIX CONTACT TC MGUARD RS4000 3G VPN8.9.0Vendor (CNA)
PHOENIX CONTACT TC MGUARD RS4000 4G ATT VPN8.9.0Vendor (CNA)
PHOENIX CONTACT TC MGUARD RS4000 4G VPN8.9.0Vendor (CNA)

+1

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
high · 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
High

Weakness class (CWE)

CWE-770 · Allocation of Resources Without Limits or Throttling

CVSS vector

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

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.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

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

All records