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CVE-2025-41697

Shell access to UART Console

MEDIUM
6.8
CVSS Score
Published: December 9, 2025 at 08:12 AM UTC
Updated: October 7, 2026 at 11:10 AM UTC
137 products affected across 1 vendorFl Switch 2308 Pn FirmwareFl Switch 2314-2sfp Pn FirmwareFl Switch 2206-2fx Firmware

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Severity
MEDIUM6.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fl Nat 2008 Firmware· Phoenix Contact
95%
v < 3.500.0.0 ≤ v < 3.500.0.0
Affected range stops below 3.50, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-nat-2008 (same device)
Fl Nat 2208 Firmware· Phoenix Contact
95%
v < 3.500.0.0 ≤ v < 3.500.0.0
Affected range stops below 3.50, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-nat-2208 (same device)
Fl Nat 2304-2gc 2SFP Firmware· Phoenix Contact
95%
v < 3.500.0.0 ≤ v < 3.500.0.0
Affected range stops below 3.50, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-nat-2304-2gc-2sfp (same device)
Fl Switch 2005 Firmware· Phoenix Contact
95%
v < 3.500.0.0 ≤ v < 3.500.0.0
Affected range stops below 3.50, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-switch-2005 (same device)
Fl Switch 2008 Firmware· Phoenix Contact
95%
v < 3.500.0.0 ≤ v < 3.500.0.0
Affected range stops below 3.50, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-switch-2008 (same device)
Fl Switch 2008F Firmware· Phoenix Contact
95%
v < 3.500.0.0 ≤ v < 3.500.0.0
Affected range stops below 3.50, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-switch-2008f (same device)
Fl Switch 2016 Firmware· Phoenix Contact
95%
v < 3.500.0.0 ≤ v < 3.500.0.0
Affected range stops below 3.50, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-switch-2016 (same device)
Fl Switch 2105 Firmware· Phoenix Contact
95%
v < 3.500.0.0 ≤ v < 3.500.0.0
Affected range stops below 3.50, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-switch-2105 (same device)
Fl Switch 2108 Firmware· Phoenix Contact
95%
v < 3.500.0.0 ≤ v < 3.500.0.0
Affected range stops below 3.50, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-switch-2108 (same device)
Fl Switch 2116 Firmware· Phoenix Contact
95%
v < 3.500.0.0 ≤ v < 3.500.0.0
Affected range stops below 3.50, so it looks safe — our inference, not a vendor statement
phoenixcontact-fl-switch-2116 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Third Party Advisory
Source: cverecord
https://certvde.com/de/advisories/VDE-2025-071

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.8MEDIUMCERTVDE
Attack Vector
PHYSICAL
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-1299

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