vde-2025-102
CRITICAL CVSS 9.8 csaf_wagogmbhcokg
Description
Multiple WAGO devices are affected by a vulnerability in the dynamic creation of BACnet File Objects. The object name is used as a file path without sufficient validation and is not restricted to the intended directory, so relative paths can be used to reach files elsewhere in the file system.
Timeline
- Published
- 2026-10-01 10:00 UTC
- Last Modified
- 2026-10-01
CVSS Details
CVSS details not available.
Affected Products
No product information available.
Weaknesses (CWE)
References
No references available.
Linked Vulnerabilities
No linked vulnerabilities found.
{
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"summary": "coordination",
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"category": "summary",
"text": "Multiple WAGO devices are affected by a vulnerability in the dynamic creation of BACnet File Objects. The object name is used as a file path without sufficient validation and is not restricted to the intended directory, so relative paths can be used to reach files elsewhere in the file system.",
"title": "Summary"
},
{
"category": "description",
"text": "An attacker can read or overwrite arbitrary files without authentication via BACnet File Object indirect addressing. This may expose sensitive data (e.g., password files) and enable full system compromise or service disruption.",
"title": "Impact"
},
{
"category": "description",
"text": "Update to Firmware version 4.8.9 (FW30) or higher. For the latest custom Firmware please contact the WAGO support.",
"title": "Remediation"
},
{
"category": "other",
"text": "WAGO controllers must never be exposed directly to the Internet without additional security measures such as firewalls, VPNs and proper network segmentation. BACnet/IP is not a secure protocol because it lacks encryption and authentication which makes systems vulnerable to unauthorized access and manipulation",
"title": "Disclaimer"
}
],
"publisher": {
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"contact_details": "psirt@wago.com",
"name": "WAGO GmbH & Co. KG",
"namespace": "https://www.wago.com/psirt"
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"references": [
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"category": "self",
"summary": "WAGO PSIRT",
"url": "https://www.wago.com/de-en/automation-technology/psirt"
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"summary": "CERT@VDE Security Advisories for WAGO",
"url": "https://certvde.com/de/advisories/vendor/wago/"
},
{
"category": "self",
"summary": "VDE-2025-102: WAGO: Multiple Devices are affected by a Vulnerability in BACnet IP Stack - HTML",
"url": "https://certvde.com/en/advisories/VDE-2025-102"
},
{
"category": "self",
"summary": "VDE-2025-102: WAGO: Multiple Devices are affected by a Vulnerability in BACnet IP Stack - CSAF",
"url": "https://wago.csaf-tp.certvde.com/.well-known/csaf/white/2026/vde-2025-102.json"
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"title": "WAGO: Multiple Devices are affected by a Vulnerability in BACnet IP Stack",
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"cwe": {
"id": "CWE-22",
"name": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')"
},
"notes": [
{
"category": "description",
"text": "The object name of a dynamically created BACnet File Object is interpreted as a file path without sufficient validation. Because relative paths are not limited to the intended directory, an unauthenticated remote attacker can traverse outside of it and read or overwrite arbitrary files on the device, which may lead to full system compromise.",
"title": "CVE description"
}
],
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"CSAFPID-32003",
"CSAFPID-32004",
"CSAFPID-32005",
"CSAFPID-32006",
"CSAFPID-32007",
"CSAFPID-32008",
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"CSAFPID-32010",
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],
"known_affected": [
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"CSAFPID-31002",
"CSAFPID-31003",
"CSAFPID-31004",
"CSAFPID-31005",
"CSAFPID-31006",
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"CSAFPID-31018",
"CSAFPID-31019",
"CSAFPID-31020",
"CSAFPID-31021",
"CSAFPID-31022"
]
},
"references": [
{
"category": "external",
"summary": "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 - 9.3 / Critical",
"url": "https://www.first.org/cvss/calculator/4.0#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"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Update to Firmware version 4.8.9 (FW30) or higher. For the latest custom Firmware please contact the WAGO support.",
"group_ids": [
"CSAFGID-0001"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"environmentalScore": 9.8,
"environmentalSeverity": "CRITICAL",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"temporalScore": 9.8,
"temporalSeverity": "CRITICAL",
"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"
},
"products": [
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"CSAFPID-31002",
"CSAFPID-31003",
"CSAFPID-31004",
"CSAFPID-31005",
"CSAFPID-31006",
"CSAFPID-31007",
"CSAFPID-31008",
"CSAFPID-31009",
"CSAFPID-31010",
"CSAFPID-31011",
"CSAFPID-31012",
"CSAFPID-31013",
"CSAFPID-31014",
"CSAFPID-31015",
"CSAFPID-31016",
"CSAFPID-31017",
"CSAFPID-31018",
"CSAFPID-31019",
"CSAFPID-31020",
"CSAFPID-31021",
"CSAFPID-31022"
]
}
],
"title": "Path traversal in dynamically created BACnet File Objects"
}
]
}