Advisory Details

July 21st, 2025

(Pwn2Own) Phoenix Contact CHARX SEC-3150 Configuration Service Missing Authentication Vulnerability

ZDI-25-622
ZDI-CAN-26331

CVE ID CVE-2025-25268
CVSS SCORE 8.8, AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS Phoenix Contact
AFFECTED PRODUCTS CHARX SEC-3150
VULNERABILITY DETAILS

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of Phoenix Contact CHARX SEC-3150 devices. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the configuration service, which listens on TCP port 5001 by default. The issue results from the lack of authentication prior to allowing access to functionality. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the device.

ADDITIONAL DETAILS Phoenix Contact has issued an update to correct this vulnerability. More details can be found at:
https://certvde.com/en/advisories/VDE-2025-019/
DISCLOSURE TIMELINE
  • 2025-03-04 - Vulnerability reported to vendor
  • 2025-07-21 - Coordinated public release of advisory
  • 2025-07-21 - Advisory Updated
CREDIT HT3 Labs (@ht3labs)
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