CVE-2026-4769 — CRITICAL (9.8)

Vulnerability Description

Certain devices in the WAGO System I/O Field series activate an internal diagnostic capability during the initial startup sequence. This functionality is not formally documented and becomes accessible without authentication for a brief period in the early boot phase. During this window, an unauthenticated remote attacker can gain access to the internal system processes, resulting in full system compromise.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-912

References

https://www.certvde.com/en/advisories/VDE-2026-031/

FAQ

What is CVE-2026-4769?

CVE-2026-4769 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Certain devices in the WAGO System I/O Field series activate an internal diagnostic capability during the initial startup sequence. This functionality is not formally documented and becomes accessible...

How severe is CVE-2026-4769?

CVE-2026-4769 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-4769?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.