CVE-2025-41697

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. It has a CVSS v3.1 base score of 6.8 (MEDIUM).

CVE-2025-41697 has a CVSS v3.1 score of 6.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

CVE-2025-41697 affects products from phoenixcontact, specifically: fl_nat_2008, fl_nat_2008_firmware, fl_nat_2208, fl_nat_2208_firmware, fl_nat_2304-2gc-2sfp, fl_nat_2304-2gc-2sfp_firmware, fl_switch_2005, fl_switch_2005_firmware, fl_switch_2008, fl_switch_2008_firmware, fl_switch_2008f, fl_switch_2008f_firmware, fl_switch_2016, fl_switch_2016_firmware, fl_switch_2105, fl_switch_2105_firmware, fl_switch_2108, fl_switch_2108_firmware, fl_switch_2116, fl_switch_2116_firmware, fl_switch_2204-2tc-2sfx, fl_switch_2204-2tc-2sfx_firmware, fl_switch_2205, fl_switch_2205_firmware, fl_switch_2206-2fx, fl_switch_2206-2fx_firmware, fl_switch_2206-2fx_sm, fl_switch_2206-2fx_sm_firmware, fl_switch_2206-2fx_sm_st, fl_switch_2206-2fx_sm_st_firmware, fl_switch_2206-2fx_st, fl_switch_2206-2fx_st_firmware, fl_switch_2206-2sfx, fl_switch_2206-2sfx_firmware, fl_switch_2206-2sfx_pn, fl_switch_2206-2sfx_pn_firmware, fl_switch_2206c-2fx, fl_switch_2206c-2fx_firmware, fl_switch_2207-fx, fl_switch_2207-fx_firmware, fl_switch_2207-fx_sm, fl_switch_2207-fx_sm_firmware, fl_switch_2208, fl_switch_2208_firmware, fl_switch_2208_pn, fl_switch_2208_pn_firmware, fl_switch_2208c, fl_switch_2208c_firmware, fl_switch_2212-2tc-2sfx, fl_switch_2212-2tc-2sfx_firmware, fl_switch_2214-2fx, fl_switch_2214-2fx_firmware, fl_switch_2214-2fx_sm, fl_switch_2214-2fx_sm_firmware, fl_switch_2214-2sfx, fl_switch_2214-2sfx_firmware, fl_switch_2214-2sfx_pn, fl_switch_2214-2sfx_pn_firmware, fl_switch_2216, fl_switch_2216_firmware, fl_switch_2216_pn, fl_switch_2216_pn_firmware, fl_switch_2303-8sp1, fl_switch_2304-2gc-2sfp, fl_switch_2304-2gc-2sfp_firmware, fl_switch_2306-2sfp, fl_switch_2306-2sfp_firmware, fl_switch_2306-2sfp_pn, fl_switch_2306-2sfp_pn_firmware, fl_switch_2308, fl_switch_2308_firmware, fl_switch_2308_pn, fl_switch_2308_pn_firmware, fl_switch_2312-2gc-2sfp, fl_switch_2312-2gc-2sfp_firmware, fl_switch_2314-2sfp, fl_switch_2314-2sfp_firmware, fl_switch_2314-2sfp_pn, fl_switch_2314-2sfp_pn_firmware, fl_switch_2316, fl_switch_2316\/k1, fl_switch_2316\/k1_firmware, fl_switch_2316_firmware, fl_switch_2316_pn, fl_switch_2316_pn_firmware, fl_switch_2404-2tc-2sfx, fl_switch_2404-2tc-2sfx_firmware, fl_switch_2406-2sfx, fl_switch_2406-2sfx_firmware, fl_switch_2406-2sfx_pn, fl_switch_2406-2sfx_pn_firmware, fl_switch_2408, fl_switch_2408_firmware, fl_switch_2408_pn, fl_switch_2408_pn_firmware, fl_switch_2412-2tc-2sfx, fl_switch_2412-2tc-2sfx_firmware, fl_switch_2414-2sfx, fl_switch_2414-2sfx_firmware, fl_switch_2414-2sfx_pn, fl_switch_2414-2sfx_pn_firmware, fl_switch_2416, fl_switch_2416_firmware, fl_switch_2416_pn, fl_switch_2416_pn_firmware, fl_switch_2504-2gc-2sfp, fl_switch_2504-2gc-2sfp_firmware, fl_switch_2506-2sfp, fl_switch_2506-2sfp\/k1, fl_switch_2506-2sfp\/k1_firmware, fl_switch_2506-2sfp_firmware, fl_switch_2506-2sfp_pn, fl_switch_2506-2sfp_pn_firmware, fl_switch_2508, fl_switch_2508\/k1, fl_switch_2508\/k1_firmware, fl_switch_2508_firmware, fl_switch_2508_pn, fl_switch_2508_pn_firmware, fl_switch_2512-2gc-2sfp, fl_switch_2512-2gc-2sfp_firmware, fl_switch_2514-2sfp, fl_switch_2514-2sfp_firmware, fl_switch_2514-2sfp_pn, fl_switch_2514-2sfp_pn_firmware, fl_switch_2516, fl_switch_2516_firmware, fl_switch_2516_pn, fl_switch_2516_pn_firmware, fl_switch_2608, fl_switch_2608_firmware, fl_switch_2608_pn, fl_switch_2608_pn_firmware, fl_switch_2708, fl_switch_2708_firmware, fl_switch_2708_pn, fl_switch_2708_pn_firmware. Check the affected products table above for specific version ranges.

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.