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Vulnerability · Published Dec 9, 2025 · Assigned by CERTVDE

CVE-2025-41697Shell access to UART Console

Medium 6.8

In plain English

A medium-severity security flaw in FL SWITCH 2005 from Phoenix Contact. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).

Severity (CVSS 3.1)6.8Medium
Exploit odds (30 days)0.2%top 85.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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 products (as reported)

VendorProductVersions
Phoenix Contact FL SWITCH 2005 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2008 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2016 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2105 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2108 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2116 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2204-2TC-2SFX 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2205 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2206-2FX 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2206-2FX SM 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2206-2FX SM ST 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2206-2FX ST 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2206-2SFX 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2206-2SFX PN 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2206C-2FX 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2207-FX 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2207-FX SM 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2208 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2208 PN 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2208C 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2212-2TC-2SFX 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2214-2FX 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2214-2FX SM 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2214-2SFX 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2214-2SFX PN 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2216 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2216 PN 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2304-2GC-2SFP 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2306-2SFP 0.0.0 – before 3.50
Phoenix Contact FL SWITCH 2306-2SFP PN 0.0.0 – before 3.50

Weakness: CWE-1299 · Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References