An attacker can use an undocumented UART port on the PCB as a side-channel to get root access e.g

Overview

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.

Affected

• fl_switch_2708_pn_firmware < 3.50
• fl_switch_2708_firmware < 3.50
• fl_switch_2608_pn_firmware < 3.50
• fl_switch_2608_firmware < 3.50
• fl_switch_2516_pn_firmware < 3.50
• fl_switch_2516_firmware < 3.50
• fl_switch_2514-2sfp_pn_firmware < 3.50
• fl_switch_2514-2sfp_firmware < 3.50
• fl_switch_2512-2gc-2sfp_firmware < 3.50
• fl_switch_2508_pn_firmware < 3.50
• fl_switch_2508/k1_firmware < 3.50
• fl_switch_2508_firmware < 3.50
• fl_switch_2506-2sfp_pn_firmware < 3.50
• fl_switch_2506-2sfp/k1_firmware < 3.50
• fl_switch_2506-2sfp_firmware < 3.50
• fl_switch_2504-2gc-2sfp_firmware < 3.50
• fl_switch_2416_pn_firmware < 3.50
• fl_switch_2416_firmware < 3.50
• fl_switch_2414-2sfx_pn_firmware < 3.50
• fl_switch_2414-2sfx_firmware < 3.50
• fl_switch_2412-2tc-2sfx_firmware < 3.50
• fl_switch_2408_pn_firmware < 3.50
• fl_switch_2408_firmware < 3.50
• fl_switch_2406-2sfx_pn_firmware < 3.50
• fl_switch_2406-2sfx_firmware < 3.50
• fl_switch_2404-2tc-2sfx_firmware < 3.50
• fl_switch_2316_pn_firmware < 3.50
• fl_switch_2316/k1_firmware < 3.50
• fl_switch_2316_firmware < 3.50
• fl_switch_2314-2sfp_pn_firmware < 3.50
• fl_switch_2314-2sfp_firmware < 3.50
• fl_switch_2312-2gc-2sfp_firmware < 3.50
• fl_switch_2308_pn_firmware < 3.50
• fl_switch_2308_firmware < 3.50
• fl_switch_2306-2sfp_pn_firmware < 3.50
• fl_switch_2306-2sfp_firmware < 3.50
• fl_switch_2304-2gc-2sfp_firmware < 3.50
• fl_switch_2303-8sp1 < 3.50
• fl_switch_2216_pn_firmware < 3.50
• fl_switch_2216_firmware < 3.50
• fl_switch_2214-2sfx_pn_firmware < 3.50
• fl_switch_2214-2sfx_firmware < 3.50
• fl_switch_2214-2fx_sm_firmware < 3.50
• fl_switch_2214-2fx_firmware < 3.50
• fl_switch_2212-2tc-2sfx_firmware < 3.50
• fl_switch_2208c_firmware < 3.50
• fl_switch_2208_pn_firmware < 3.50
• fl_switch_2208_firmware < 3.50
• fl_switch_2207-fx_sm_firmware < 3.50
• fl_switch_2207-fx_firmware < 3.50
• fl_switch_2206c-2fx_firmware < 3.50
• fl_switch_2206-2sfx_pn_firmware < 3.50
• fl_switch_2206-2sfx_firmware < 3.50
• fl_switch_2206-2fx_st_firmware < 3.50
• fl_switch_2206-2fx_sm_st_firmware < 3.50
• fl_switch_2206-2fx_sm_firmware < 3.50
• fl_switch_2206-2fx_firmware < 3.50
• fl_switch_2205_firmware < 3.50
• fl_switch_2204-2tc-2sfx_firmware < 3.50
• fl_switch_2116_firmware < 3.50
• fl_switch_2108_firmware < 3.50
• fl_switch_2105_firmware < 3.50
• fl_switch_2016_firmware < 3.50
• fl_switch_2008f_firmware < 3.50
• fl_switch_2008_firmware < 3.50
• fl_switch_2005_firmware < 3.50
• fl_nat_2304-2gc-2sfp_firmware < 3.50
• fl_nat_2208_firmware < 3.50
• fl_nat_2008_firmware < 3.50

Remediation

Upgrade past the affected range:

• fl_switch_2708_pn_firmware 3.50
• fl_switch_2708_firmware 3.50
• fl_switch_2608_pn_firmware 3.50
• fl_switch_2608_firmware 3.50
• fl_switch_2516_pn_firmware 3.50
• fl_switch_2516_firmware 3.50
• fl_switch_2514-2sfp_pn_firmware 3.50
• fl_switch_2514-2sfp_firmware 3.50
• fl_switch_2512-2gc-2sfp_firmware 3.50
• fl_switch_2508_pn_firmware 3.50
• fl_switch_2508/k1_firmware 3.50
• fl_switch_2508_firmware 3.50
• fl_switch_2506-2sfp_pn_firmware 3.50
• fl_switch_2506-2sfp/k1_firmware 3.50
• fl_switch_2506-2sfp_firmware 3.50
• fl_switch_2504-2gc-2sfp_firmware 3.50
• fl_switch_2416_pn_firmware 3.50
• fl_switch_2416_firmware 3.50
• fl_switch_2414-2sfx_pn_firmware 3.50
• fl_switch_2414-2sfx_firmware 3.50
• fl_switch_2412-2tc-2sfx_firmware 3.50
• fl_switch_2408_pn_firmware 3.50
• fl_switch_2408_firmware 3.50
• fl_switch_2406-2sfx_pn_firmware 3.50
• fl_switch_2406-2sfx_firmware 3.50
• fl_switch_2404-2tc-2sfx_firmware 3.50
• fl_switch_2316_pn_firmware 3.50
• fl_switch_2316/k1_firmware 3.50
• fl_switch_2316_firmware 3.50
• fl_switch_2314-2sfp_pn_firmware 3.50
• fl_switch_2314-2sfp_firmware 3.50
• fl_switch_2312-2gc-2sfp_firmware 3.50
• fl_switch_2308_pn_firmware 3.50
• fl_switch_2308_firmware 3.50
• fl_switch_2306-2sfp_pn_firmware 3.50
• fl_switch_2306-2sfp_firmware 3.50
• fl_switch_2304-2gc-2sfp_firmware 3.50
• fl_switch_2303-8sp1 3.50
• fl_switch_2216_pn_firmware 3.50
• fl_switch_2216_firmware 3.50
• fl_switch_2214-2sfx_pn_firmware 3.50
• fl_switch_2214-2sfx_firmware 3.50
• fl_switch_2214-2fx_sm_firmware 3.50
• fl_switch_2214-2fx_firmware 3.50
• fl_switch_2212-2tc-2sfx_firmware 3.50
• fl_switch_2208c_firmware 3.50
• fl_switch_2208_pn_firmware 3.50
• fl_switch_2208_firmware 3.50
• fl_switch_2207-fx_sm_firmware 3.50
• fl_switch_2207-fx_firmware 3.50
• fl_switch_2206c-2fx_firmware 3.50
• fl_switch_2206-2sfx_pn_firmware 3.50
• fl_switch_2206-2sfx_firmware 3.50
• fl_switch_2206-2fx_st_firmware 3.50
• fl_switch_2206-2fx_sm_st_firmware 3.50
• fl_switch_2206-2fx_sm_firmware 3.50
• fl_switch_2206-2fx_firmware 3.50
• fl_switch_2205_firmware 3.50
• fl_switch_2204-2tc-2sfx_firmware 3.50
• fl_switch_2116_firmware 3.50
• fl_switch_2108_firmware 3.50
• fl_switch_2105_firmware 3.50
• fl_switch_2016_firmware 3.50
• fl_switch_2008f_firmware 3.50
• fl_switch_2008_firmware 3.50
• fl_switch_2005_firmware 3.50
• fl_nat_2304-2gc-2sfp_firmware 3.50
• fl_nat_2208_firmware 3.50
• fl_nat_2008_firmware 3.50