CVE-2025-41666: Phoenix Contact: File access due to the replacement of a critical file used by the watchdog

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-07-08 · updated 2026-06-17
Weakness: CWE-59

Description

A low privileged remote attacker with file access can replace a critical file used by the watchdog to get read, write and execute access to any file on the device after the watchdog has been initialized.

Affected products

PHOENIX CONTACT AXC F 1152: before 2025.0.2 — fixed in 2025.0.2
PHOENIX CONTACT AXC F 2152: before 2025.0.2 — fixed in 2025.0.2
PHOENIX CONTACT AXC F 3152: before 2025.0.2 — fixed in 2025.0.2
PHOENIX CONTACT BPC 9102S: before 2025.0.2 — fixed in 2025.0.2
PHOENIX CONTACT RFC 4072S: before 2025.0.2 — fixed in 2025.0.2

How to fix

Upgrade to a fixed version: PHOENIX CONTACT AXC F 1152 2025.0.2; PHOENIX CONTACT AXC F 2152 2025.0.2; PHOENIX CONTACT AXC F 3152 2025.0.2; PHOENIX CONTACT BPC 9102S 2025.0.2; PHOENIX CONTACT RFC 4072S 2025.0.2. Check the vendor advisory for mitigations.

References

https://certvde.com/en/advisories/VDE-2025-054

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