Phoenix Contact CHARX SEC-3000 Command Injection Remote Code Execution Vulnerability

July 30th, 2026
ZDI-26-521 ZDI-CAN-27762

CVE ID

CVE-2026-44095

CVSS Score

6.8 AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

Phoenix Contact

Affected Products

CHARX SEC-3000

Vulnerability Details

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Phoenix Contact CHARX SEC-3000 devices. Authentication is required to exploit this vulnerability.

The specific flaw exists within the handling of the defaultroutemetric parameter to the config service. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root.

Additional Details

Phoenix Contact has issued an update to correct this vulnerability. More details can be found at:
https://certvde.com/en/advisories/VDE-2026-008/

Disclosure Timeline

  • 2026-04-14 - Vulnerability reported to vendor
  • 2026-07-30 - Coordinated public release of advisory
  • 2026-07-30 - Advisory Updated

Credit

Piotr Ptaszek and Mateusz Wójcik

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