(Pwn2Own) Phoenix Contact CHARX SEC-3150 BackendURL WebSocket Command Injection Remote Code Execution Vulnerability

July 30th, 2026
ZDI-26-517 ZDI-CAN-29054

CVE ID

CVE-2026-44098

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-3150

Vulnerability Details

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Phoenix Contact CHARX SEC-3150 devices. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.

The specific flaw exists within the handling of log files. 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 the charx-oa account.

Additional Details

Fixed in firmware v1.9.1, available by Aug 12, 2026.
https://certvde.com/en/advisories/VDE-2026-008/


Disclosure Timeline

  • 2026-02-09 - Vulnerability reported to vendor
  • 2026-07-30 - Coordinated public release of advisory
  • 2026-07-30 - Advisory Updated

Credit

Donggeon Kim(@gbdngb12), Hoon Nam(@pwnstar96), Jaeho Jeong(@jeongZero), Sangsoo Jeong(@sangs00Jeong) and Wonyoung Jung(@nonetype_pwn) of 78ResearchLab

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