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Vulnerability record · CVE-2026-4769 · published 13 July 2026

CVE-2026-4769: Certain devices in the WAGO System I/O Field series activate an internal diagnostic capability during the init…

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.

9.3 CVSS 4.0 Critical EPSS 0.76% · top 46.7% CWE-912 · CWE-912 Awaiting Analysis
9.3CVSS 4.0 base score
0.76%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
13 Jul 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-4769), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.