CVE-2026-4769
Unauthenticated Access to Internal Diagnostic Interface
CVSS Score
9.8
EPSS Score
0.4%
EPSS Percentile
36th
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.
| CWE | CWE-912 |
| Vendor | wago |
| Product | 0765-110x/0100-0000 |
| Published | Jul 13, 2026 |
| Last Updated | Jul 13, 2026 |
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CVSS v3 Breakdown
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
Affected Versions
WAGO / 0765-110x/0100-0000
1.0.0.0 < 1.2.1.100
WAGO / 0765-120x/0100-0000
1.0.0.0 < 1.2.7.100
WAGO / 0765-150x/0100-0000
1.0.0.0 < 1.2.7.103
WAGO / 0765-2101/0100-0000
1.0.0.0 < 1.2.1.102
WAGO / 0765-2102/0100-0000
1.0.0.0 < 1.2.5.101
WAGO / 0765-410x/0100-0000
1.0.0.0 < 1.2.1.100
WAGO / 0765-420x/0100-0000
1.0.0.0 < 1.2.7.100
WAGO / 0765-450x/0100-0000
1.0.0.0 < 1.2.7.103