Riskcovery

CVE-2026-4769

Unauthenticated Access to Internal Diagnostic Interface

State
Published
Severity
9.3 Critical
Published
Jul 13, 2026
Updated
Jul 13, 2026
Reserved
Mar 24, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
4.09.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NCERTVDE
3.19.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCERTVDE

Weaknesses

Affected Products

ProductVersions
0765-110x/0100-0000WAGO
  • 1.0.0.0 to before 1.2.1.100Affected
0765-120x/0100-0000WAGO
  • 1.0.0.0 to before 1.2.7.100Affected
0765-150x/0100-0000WAGO
  • 1.0.0.0 to before 1.2.7.103Affected
0765-2101/0100-0000WAGO
  • 1.0.0.0 to before 1.2.1.102Affected
0765-2102/0100-0000WAGO
  • 1.0.0.0 to before 1.2.5.101Affected
0765-410x/0100-0000WAGO
  • 1.0.0.0 to before 1.2.1.100Affected
0765-420x/0100-0000WAGO
  • 1.0.0.0 to before 1.2.7.100Affected
0765-450x/0100-0000WAGO
  • 1.0.0.0 to before 1.2.7.103Affected

References

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