(Pwn2Own) Phoenix Contact CHARX SEC-3150 Race Condition Firewall Bypass Vulnerability

July 30th, 2026
ZDI-26-503 ZDI-CAN-29058

CVE ID

CVE-2026-44108

CVSS Score

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

Affected Vendors

Phoenix Contact

Affected Products

CHARX SEC-3150

Vulnerability Details

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

The specific flaw exists within the handling of firewall rules. The issue results from improper access control during device shutdown. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root.

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

PetoWorks (@petoworks)

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