Medium · published December 9, 2025
An attacker can use an undocumented UART port on the PCB as a side-channel to get root access e.g. with the credentials obtained from CVE-2025-41692.
| Product | Versions | Fixed in |
|---|---|---|
| phoenixcontact/fl_switch_2708_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2708_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2608_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2608_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2516_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2516_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2514-2sfp_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2514-2sfp_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2512-2gc-2sfp_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2508_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2508\/k1_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2508_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2506-2sfp_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2506-2sfp\/k1_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2506-2sfp_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2504-2gc-2sfp_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2416_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2416_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2414-2sfx_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2414-2sfx_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2412-2tc-2sfx_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2408_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2408_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2406-2sfx_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2406-2sfx_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2404-2tc-2sfx_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2316_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2316\/k1_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2316_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2314-2sfp_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2314-2sfp_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2312-2gc-2sfp_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2308_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2308_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2306-2sfp_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2306-2sfp_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2304-2gc-2sfp_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2303-8sp1 | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2216_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2216_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2214-2sfx_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2214-2sfx_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2214-2fx_sm_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2214-2fx_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2212-2tc-2sfx_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2208c_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2208_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2208_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2207-fx_sm_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2207-fx_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2206c-2fx_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2206-2sfx_pn_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2206-2sfx_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2206-2fx_st_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2206-2fx_sm_st_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2206-2fx_sm_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2206-2fx_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2205_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2204-2tc-2sfx_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2116_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2108_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2105_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2016_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2008f_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2008_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_switch_2005_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_nat_2304-2gc-2sfp_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_nat_2208_firmware | < 3.50 | 3.50 |
| phoenixcontact/fl_nat_2008_firmware | < 3.50 | 3.50 |