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Vulnerability record · CVE-2022-3480 · published 15 November 2022

CVE-2022-3480: Phoenixcontact fl mguard centerport firmware allocation without limits vulnerability

Phoenixcontact · Fl Mguard Centerport Firmware

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.

7.5 CVSS 3.1 High EPSS 0.91% · top 41.5% CWE-770 · Allocation without limits
7.5CVSS 3.1 base score
0.91%EPSS exploitation probability, 30 days
NoNot in CISA KEV
31Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

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

Affected products

31 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cert.vde.com/en/advisories/VDE-2022-051/ MitigationThird Party Advisory
https://cert.vde.com/en/advisories/VDE-2022-051/ MitigationThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-3480), CISA KEV, FIRST EPSS (scores of 2026-10-04). This page is refreshed as NVD updates the record.