What’s Vulnerable › Vulnerabilities

CVE-2018-13990

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-05-06 · updated 2026-06-17
• Weakness: CWE-287

Description

The WebUI of PHOENIX CONTACT FL SWITCH 3xxx, 4xxx, 48xx versions prior to 1.35 is vulnerable to brute-force attacks, because of Improper Restriction of Excessive Authentication Attempts.

Affected products

• Phoenixcontact Fl Switch 3004T-Fx Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 3004T-Fx St Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 3005 Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 3005T Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 3006T-2Fx Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 3006T-2Fx Sm Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 3006T-2Fx St Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 3008 Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 3008T Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 3012E-2Fx Sm Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 3012E-2Sfx Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 3016 Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 3016E Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 3016T Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 4000T-8Poe-2Sfp-R Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 4008T-2Gt-3Fx Sm Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 4008T-2Gt-4Fx Sm Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 4008T-2Sfp Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 4012T-2Gt-2Fx St Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 4012T 2Gt 2Fx Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 4800E-24Fx-4Gc Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 4800E-24Fx Sm-4Gc Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 4808E-16Fx-4Gc Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 4808E-16Fx Lc-4Gc Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 4808E-16Fx Sm-4Gc Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 4808E-16Fx Sm Lc-4Gc Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 4808E-16Fx Sm St-4Gc Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 4808E-16Fx St-4Gc Firmware: before 1.35 — fixed in 1.35
• Phoenixcontact Fl Switch 4824E-4Gc Firmware: before 1.35 — fixed in 1.35

How to fix

Upgrade to a fixed version: Phoenixcontact Fl Switch 3004T-Fx Firmware 1.35; Phoenixcontact Fl Switch 3004T-Fx St Firmware 1.35; Phoenixcontact Fl Switch 3005 Firmware 1.35; Phoenixcontact Fl Switch 3005T Firmware 1.35; Phoenixcontact Fl Switch 3006T-2Fx Firmware 1.35; Phoenixcontact Fl Switch 3006T-2Fx Sm Firmware 1.35; Phoenixcontact Fl Switch 3006T-2Fx St Firmware 1.35; Phoenixcontact Fl Switch 3008 Firmware 1.35; Phoenixcontact Fl Switch 3008T Firmware 1.35; Phoenixcontact Fl Switch 3012E-2Fx Sm Firmware 1.35; Phoenixcontact Fl Switch 3012E-2Sfx Firmware 1.35; Phoenixcontact Fl Switch 3016 Firmware 1.35. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/106737
• https://ics-cert.us-cert.gov/advisories/ICSA-19-024-02
• http://www.securityfocus.com/bid/106737
• https://ics-cert.us-cert.gov/advisories/ICSA-19-024-02

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