vde-2025-048
HIGH CVSS 7.5 csaf_wagogmbhcokg
Description
A design flaw in the file system management exposes internal system partitions - intended to be hidden - during brief moments when they are mounted by the firmware. These partitions contain sensitive data such as firmware and certificates. Although access to the file system is mediated by a Nucleus layer that supports permission control, these permissions are currently not enforced. As a result, services like FTP/SFTP may inadvertently gain access to critical internal resources, increasing the risk of unauthorized access or data leakage.
Timeline
- Published
- 2025-09-08 07:00 UTC
- Last Modified
- 2025-09-08
CVSS Details
CVSS details not available.
Affected Products
No product information available.
Weaknesses (CWE)
References
No references available.
Linked Vulnerabilities
No linked vulnerabilities found.
{
"document": {
"acknowledgments": [
{
"organization": "CERT@VDE",
"summary": "coordination",
"urls": [
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"aggregate_severity": {
"namespace": "https://www.first.org/cvss/v3.1/specification-document#Qualitative-Severity-Rating-Scale",
"text": "High"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
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"lang": "en-GB",
"notes": [
{
"category": "summary",
"text": "A design flaw in the file system management exposes internal system partitions - intended to be hidden - during brief moments when they are mounted by the firmware. These partitions contain sensitive data such as firmware and certificates. Although access to the file system is mediated by a Nucleus layer that supports permission control, these permissions are currently not enforced. As a result, services like FTP/SFTP may inadvertently gain access to critical internal resources, increasing the risk of unauthorized access or data leakage.",
"title": "Summary"
},
{
"category": "description",
"text": "Due to the visibility of the internal partitions a low-privileged remote attacker can escalate privileges and can for example edit the firmware files.",
"title": "Impact"
},
{
"category": "description",
"text": "Update to Firmware version 13.",
"title": "Remediation"
},
{
"category": "description",
"text": "By default, FTP is disabled on these devices. To prevent exploitation of this vulnerability, it is recommended to also disable SFTP in firmware versions below 13 through the device's configuration settings.",
"title": "Mitigation"
}
],
"publisher": {
"category": "vendor",
"contact_details": "psirt@wago.com",
"name": "WAGO GmbH & Co. KG",
"namespace": "https://www.wago.com/psirt"
},
"references": [
{
"category": "external",
"summary": "WAGO PSIRT",
"url": "https://www.wago.com/de-en/automation-technology/psirt"
},
{
"category": "external",
"summary": "CERT@VDE Security Advisories for WAGO",
"url": "https://certvde.com/de/advisories/vendor/wago/"
},
{
"category": "self",
"summary": "VDE-2025-048: WAGO: Escalation of Privileges in Coupler Firmware - HTML",
"url": "https://certvde.com/en/advisories/VDE-2025-048"
},
{
"category": "self",
"summary": "VDE-2025-048: WAGO: Escalation of Privileges in Coupler Firmware - CSAF",
"url": "https://wago.csaf-tp.certvde.com/.well-known/csaf/white/2025/vde-2025-048.json"
}
],
"title": "WAGO: Escalation of Privileges in Coupler Firmware",
"tracking": {
"aliases": [
"VDE-2025-048"
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"current_release_date": "2025-09-08T07:00:00.000Z",
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"date": "2025-09-08T07:00:00.000Z",
"number": "1",
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"status": "final",
"version": "1"
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"product_id": "CSAFPID-11005"
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},
{
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"name": "Hardware"
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"name": "<FW13",
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{
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"CSAFPID-31005",
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"CSAFPID-31007",
"CSAFPID-31008",
"CSAFPID-31009",
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"CSAFPID-32006",
"CSAFPID-32007",
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"CSAFPID-32010"
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{
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"product_id": "CSAFPID-31004"
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{
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"product_id": "CSAFPID-31005"
},
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"relates_to_product_reference": "CSAFPID-11005"
},
{
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"product_id": "CSAFPID-31006"
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{
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{
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"product_id": "CSAFPID-31010"
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{
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{
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{
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"product_id": "CSAFPID-32007"
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{
"category": "installed_on",
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"product_id": "CSAFPID-32008"
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"relates_to_product_reference": "CSAFPID-11008"
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{
"category": "installed_on",
"full_product_name": {
"name": "WAGO Firmware FW13 installed on Coupler 0750-0365/0040-0010",
"product_id": "CSAFPID-32009"
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"product_reference": "CSAFPID-22001",
"relates_to_product_reference": "CSAFPID-11009"
},
{
"category": "installed_on",
"full_product_name": {
"name": "WAGO Firmware FW13 installed on Coupler 0750-0366",
"product_id": "CSAFPID-32010"
},
"product_reference": "CSAFPID-22001",
"relates_to_product_reference": "CSAFPID-11010"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2025-41664",
"cwe": {
"id": "CWE-732",
"name": "Incorrect Permission Assignment for Critical Resource"
},
"notes": [
{
"category": "description",
"text": "A low-privileged remote attacker could gain unauthorized access to critical resources, such as firmware and certificates, due to improper permission handling during the runtime of services (e.g., FTP/SFTP). This access could allow the attacker to escalate privileges and modify firmware.",
"title": "Vulnerability Description"
},
{
"category": "details",
"text": "The internal file system is located on an eMMC in pSLC mode with a storage capacity of 4/8 GB. There are three partitions, two of which are not visible to the user and are used for storing firmware and certificates. Additionally, there is a user partition with a size of 1 GB. The FAT32 file system is accessible to the user via services such as SFTP. Access is managed through a Nucleus intermediary layer that supports permissions, although these are not currently utilized. Access permissions on the couplers are controlled by the permissions of the respective services accessing them. There is a vulnerability in the internal partitions that are normally not visible to the user (runtime system, FTP/SFTP). However, these partitions are momentarily mounted and visible for a fraction of a second when accessed from the firmware.",
"title": "Vulnerability Details"
}
],
"product_status": {
"fixed": [
"CSAFPID-32001",
"CSAFPID-32002",
"CSAFPID-32003",
"CSAFPID-32004",
"CSAFPID-32005",
"CSAFPID-32006",
"CSAFPID-32007",
"CSAFPID-32008",
"CSAFPID-32009",
"CSAFPID-32010"
],
"known_affected": [
"CSAFPID-31001",
"CSAFPID-31002",
"CSAFPID-31003",
"CSAFPID-31004",
"CSAFPID-31005",
"CSAFPID-31006",
"CSAFPID-31007",
"CSAFPID-31008",
"CSAFPID-31009",
"CSAFPID-31010"
]
},
"remediations": [
{
"category": "vendor_fix",
"date": "2025-05-21T10:00:00.000Z",
"details": "Update to Firmware version 13.",
"group_ids": [
"CSAFGID-0001"
]
},
{
"category": "mitigation",
"date": "2025-06-03T12:00:00.000Z",
"details": "By default, FTP is disabled on these devices. To prevent exploitation of this vulnerability, it is recommended to also disable SFTP in firmware versions below 13 through the device's configuration settings.",
"group_ids": [
"CSAFGID-0001"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"environmentalScore": 7.5,
"environmentalSeverity": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"temporalScore": 7.5,
"temporalSeverity": "HIGH",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
"CSAFPID-31001",
"CSAFPID-31002",
"CSAFPID-31003",
"CSAFPID-31004",
"CSAFPID-31005",
"CSAFPID-31006",
"CSAFPID-31007",
"CSAFPID-31008",
"CSAFPID-31009",
"CSAFPID-31010"
]
}
],
"title": "CVE-2025-41664"
}
]
}