Vulnerability-Lookup

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

Vulnerability from cvelistv5 – Published: 2026-07-13 06:35 – Updated: 2026-07-13 14:44

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 · CISA-ADP (v2.0.3)

Decision recorded 2026-07-13 14:44 UTC

CWE

CWE-912 - Hidden Functionality

Assigner

CERTVDE icscert root

References

1 reference

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

Impacted products

8 products

Vendor	Product	Version	CPE status
WAGO	0765-110x/0100-0000	Affected: 1.0.0.0 , < 1.2.1.100 (semver)	guessed
WAGO	0765-120x/0100-0000	Affected: 1.0.0.0 , < 1.2.7.100 (semver)	guessed
WAGO	0765-150x/0100-0000	Affected: 1.0.0.0 , < 1.2.7.103 (semver)	guessed
WAGO	0765-2101/0100-0000	Affected: 1.0.0.0 , < 1.2.1.102 (semver)	guessed
WAGO	0765-2102/0100-0000	Affected: 1.0.0.0 , < 1.2.5.101 (semver)	guessed
WAGO	0765-410x/0100-0000	Affected: 1.0.0.0 , < 1.2.1.100 (semver)	guessed
WAGO	0765-420x/0100-0000	Affected: 1.0.0.0 , < 1.2.7.100 (semver)	guessed
WAGO	0765-450x/0100-0000	Affected: 1.0.0.0 , < 1.2.7.103 (semver)	guessed

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FKIE_CVE-2026-4769

Vulnerability from fkie_nvd - Published: 2026-07-13 08:16 - Updated: 2026-07-13 19:58

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	info@cert.vde.com	https://www.certvde.com/en/advisories/VDE-2026-031/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "0765-110x/0100-0000",
          "vendor": "WAGO",
          "versions": [
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              "lessThan": "1.2.1.100",
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        },
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          "defaultStatus": "unaffected",
          "product": "0765-120x/0100-0000",
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          "versions": [
            {
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              "status": "affected",
              "version": "1.0.0.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "0765-150x/0100-0000",
          "vendor": "WAGO",
          "versions": [
            {
              "lessThan": "1.2.7.103",
              "status": "affected",
              "version": "1.0.0.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "0765-2101/0100-0000",
          "vendor": "WAGO",
          "versions": [
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              "lessThan": "1.2.1.102",
              "status": "affected",
              "version": "1.0.0.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "0765-2102/0100-0000",
          "vendor": "WAGO",
          "versions": [
            {
              "lessThan": "1.2.5.101",
              "status": "affected",
              "version": "1.0.0.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "0765-410x/0100-0000",
          "vendor": "WAGO",
          "versions": [
            {
              "lessThan": "1.2.1.100",
              "status": "affected",
              "version": "1.0.0.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "0765-420x/0100-0000",
          "vendor": "WAGO",
          "versions": [
            {
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              "status": "affected",
              "version": "1.0.0.0",
              "versionType": "semver"
            }
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        },
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              "version": "1.0.0.0",
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      ],
      "source": "info@cert.vde.com"
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  "cveTags": [],
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      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-4769",
  "lastModified": "2026-07-13T19:58:29.933",
  "metrics": {
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      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
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          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
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          "integrityImpact": "HIGH",
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          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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          "version": "3.1"
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        "source": "info@cert.vde.com",
        "type": "Secondary"
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          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
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          "attackVector": "NETWORK",
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          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "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:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "info@cert.vde.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
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          "options": [
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              "exploitation": "none"
            },
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              "automatable": "yes"
            },
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          "role": "CISA Coordinator",
          "timestamp": "2026-07-13T14:44:35.455141Z",
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  "published": "2026-07-13T08:16:21.343",
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  "sourceIdentifier": "info@cert.vde.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
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}

GHSA-2R6R-VGG5-P59V

Vulnerability from github – Published: 2026-07-13 09:31 – Updated: 2026-07-13 09:31

Details

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-4769"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-912"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-13T08:16:21Z",
    "severity": "CRITICAL"
  },
  "details": "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.",
  "id": "GHSA-2r6r-vgg5-p59v",
  "modified": "2026-07-13T09:31:42Z",
  "published": "2026-07-13T09:31:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4769"
    },
    {
      "type": "WEB",
      "url": "https://www.certvde.com/en/advisories/VDE-2026-031"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

VDE-2026-031

Vulnerability from csaf_wagogmbhcokg - Published: 2026-07-13 07:00 - Updated: 2026-07-13 07:00

Summary

WAGO: Early-Boot Diagnostic Exposure in WAGO System I/O Field Devices

Severity

Critical

Scope

1 vulnerability in this advisory, including CVE-2026-4769.

CVE-2026-4769

9.8 (Critical)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Fixed: 8 products Known affected: 8 products

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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

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

FKIE_CVE-2026-4769

GHSA-2R6R-VGG5-P59V

VDE-2026-031

Tags

Sightings

Nomenclature

Related by attack behaviour