9.3
Critical
CVE-2026-4769 Certain devices in the WAGO System I/O Field series activate an internal diagnostic capability during the initial…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| 0765-110x/0100-0000 1.0 | 1.0.0.0 → < 1.2.1.100 | 1.2.1.100 |
| 0765-120x/0100-0000 1.0 | 1.0.0.0 → < 1.2.7.100 | 1.2.7.100 |
| 0765-150x/0100-0000 1.0 | 1.0.0.0 → < 1.2.7.103 | 1.2.7.103 |
| 0765-2101/0100-0000 1.0 | 1.0.0.0 → < 1.2.1.102 | 1.2.1.102 |
| 0765-2102/0100-0000 1.0 | 1.0.0.0 → < 1.2.5.101 | 1.2.5.101 |
| 0765-410x/0100-0000 1.0 | 1.0.0.0 → < 1.2.1.100 | 1.2.1.100 |
| 0765-420x/0100-0000 1.0 | 1.0.0.0 → < 1.2.7.100 | 1.2.7.100 |
| 0765-450x/0100-0000 1.0 | 1.0.0.0 → < 1.2.7.103 | 1.2.7.103 |