Hardcoded User Password

4.6 CVSS

Vulnerability Description

An attacker can use an undocumented UART port on the PCB as a side-channel with the user hardcoded credentials obtained from CVE-2025-41692 to gain read access to parts of the filesystem of the device.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

D. Blagojevic, S. Dietz, F. Koroknai, T. Weber from CyberDanube

References

https://certvde.com/de/advisories/VDE-2025-071

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Affected Vendor

Phoenix Contact

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Affected Software

FL SWITCH 2005, FL SWITCH 2008, FL SWITCH 2016, FL SWITCH 2105, FL SWITCH 2108, FL SWITCH 2116, FL SWITCH 2204-2TC-2SFX, FL SWITCH 2205, FL SWITCH 2206-2FX, FL SWITCH 2206-2FX SM, FL SWITCH 2206-2FX SM ST, FL SWITCH 2206-2FX ST, FL SWITCH 2206-2SFX, FL SWITCH 2206-2SFX PN, FL SWITCH 2206C-2FX, FL SWITCH 2207-FX, FL SWITCH 2207-FX SM, FL SWITCH 2208, FL SWITCH 2208 PN, FL SWITCH 2208C, FL SWITCH 2212-2TC-2SFX, FL SWITCH 2214-2FX, FL SWITCH 2214-2FX SM, FL SWITCH 2214-2SFX, FL SWITCH 2214-2SFX PN, FL SWITCH 2216, FL SWITCH 2216 PN, FL SWITCH 2304-2GC-2SFP, FL SWITCH 2306-2SFP, FL SWITCH 2306-2SFP PN, FL SWITCH 2308, FL SWITCH 2308 PN, FL SWITCH 2312-2GC-2SFP, FL SWITCH 2314-2SFP, FL SWITCH 2314-2SFP PN, FL SWITCH 2316, FL SWITCH 2316 PN, FL SWITCH 2404-2TC-2SFX, FL SWITCH 2406-2SFX, FL SWITCH 2406-2SFX PN, FL SWITCH 2408, FL SWITCH 2408 PN, FL SWITCH 2412-2TC-2SFX, FL SWITCH 2414-2SFX, FL SWITCH 2414-2SFX PN, FL SWITCH 2416, FL SWITCH 2416 PN, FL SWITCH 2504-2GC-2SFP, FL SWITCH 2506-2SFP, FL SWITCH 2506-2SFP PN, FL SWITCH 2508, FL SWITCH 2508 PN, FL SWITCH 2512-2GC-2SFP, FL SWITCH 2514-2SFP, FL SWITCH 2514-2SFP PN, FL SWITCH 2516, FL SWITCH 2516 PN, FL SWITCH 2608, FL SWITCH 2608 PN, FL SWITCH 2708, FL SWITCH 2708 PN, FL SWITCH 2303-8SP1, FL NAT 2008, FL NAT 2208, FL NAT 2304-2GC-2SFP, FL SWITCH 2008F, FL SWITCH 2316/K1, FL SWITCH 2506-2SFP/K1, FL SWITCH 2508/K1

Vulnerable Versions:

0.0.0