CVE-2026-4769 (GCVE-0-2026-4769)

Vulnerability from cvelistv5 – Published: 2026-07-13 06:35 – Updated: 2026-07-13 14:44
VLAI
Title
Unauthenticated Access to Internal Diagnostic Interface
Summary
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.
Severity
9.3 (Critical)
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
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
WAGO 0765-110x/0100-0000 Affected: 1.0.0.0 , < 1.2.1.100 (semver)
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WAGO 0765-120x/0100-0000 Affected: 1.0.0.0 , < 1.2.7.100 (semver)
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WAGO 0765-150x/0100-0000 Affected: 1.0.0.0 , < 1.2.7.103 (semver)
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WAGO 0765-2101/0100-0000 Affected: 1.0.0.0 , < 1.2.1.102 (semver)
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WAGO 0765-2102/0100-0000 Affected: 1.0.0.0 , < 1.2.5.101 (semver)
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WAGO 0765-410x/0100-0000 Affected: 1.0.0.0 , < 1.2.1.100 (semver)
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WAGO 0765-420x/0100-0000 Affected: 1.0.0.0 , < 1.2.7.100 (semver)
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WAGO 0765-450x/0100-0000 Affected: 1.0.0.0 , < 1.2.7.103 (semver)
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}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.