FKIE_CVE-2026-4769
Vulnerability from fkie_nvd - Published: 2026-07-13 08:16 - Updated: 2026-07-13 19:58
Severity
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.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "0765-110x/0100-0000",
"vendor": "WAGO",
"versions": [
{
"lessThan": "1.2.1.100",
"status": "affected",
"version": "1.0.0.0",
"versionType": "semver"
}
]
},
{
"defaultStatus": "unaffected",
"product": "0765-120x/0100-0000",
"vendor": "WAGO",
"versions": [
{
"lessThan": "1.2.7.100",
"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": [
{
"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": [
{
"lessThan": "1.2.7.100",
"status": "affected",
"version": "1.0.0.0",
"versionType": "semver"
}
]
},
{
"defaultStatus": "unaffected",
"product": "0765-450x/0100-0000",
"vendor": "WAGO",
"versions": [
{
"lessThan": "1.2.7.103",
"status": "affected",
"version": "1.0.0.0",
"versionType": "semver"
}
]
}
],
"source": "info@cert.vde.com"
}
],
"cveTags": [],
"descriptions": [
{
"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": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9,
"source": "info@cert.vde.com",
"type": "Secondary"
}
],
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 9.3,
"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": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-4769",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-13T14:44:35.455141Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-07-13T08:16:21.343",
"references": [
{
"source": "info@cert.vde.com",
"url": "https://www.certvde.com/en/advisories/VDE-2026-031/"
}
],
"sourceIdentifier": "info@cert.vde.com",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-912"
}
],
"source": "info@cert.vde.com",
"type": "Secondary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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