{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-4638",
        "assignerOrgId": "551230f0-3615-47bd-b7cc-93e92e730bbf",
        "state": "PUBLISHED",
        "assignerShortName": "SEC-VLab",
        "dateReserved": "2026-03-23T10:32:11.997Z",
        "datePublished": "2026-09-24T10:57:54.203Z",
        "dateUpdated": "2026-09-24T12:14:20.861Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "551230f0-3615-47bd-b7cc-93e92e730bbf",
                "shortName": "SEC-VLab",
                "dateUpdated": "2026-09-24T10:57:54.203Z"
            },
            "title": "Plaintext Password Disclosure via VBScript Sensor Error Message in Paessler PRTG Network Monitor",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-209",
                            "description": "CWE-209 Generation of error message containing sensitive information",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-54",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-54 Query System for Information"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "Paessler GmbH",
                    "product": "PRTG Network Monitor",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "26.2.120.1449",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "PRTG Network Monitor before version 26.2.120.1449 ships a demo EXE/Script sensor that multiplies two integer parameters using cscript.exe. If a non-numeric value is passed instead, cscript.exe raises a 'Type mismatch' runtime error that includes the offending parameter value in plaintext. PRTG provides a documented placeholder variable, %windowspassword, which resolves to the configured Windows/domain password used by PRTG and can be passed as a sensor parameter. \n\n\n\n\nAny PRTG user who is not restricted to read-only access and is permitted to create sensors (the default for non-read-only users) can pass %windowspassword as an argument to the demo VBScript sensor, triggering the type-mismatch error and causing PRTG to display the plaintext password in the sensor's error output.",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "<div><span>PRTG Network Monitor before version 26.2.120.1449 ships a demo EXE/Script sensor that multiplies two integer parameters using cscript.exe. If a non-numeric value is passed instead, cscript.exe raises a 'Type mismatch' runtime error that includes the offending parameter value in plaintext. PRTG provides a documented placeholder variable, %windowspassword, which resolves to the configured Windows/domain password used by PRTG and can be passed as a sensor parameter.&nbsp;</span></div><div><span><br></span></div><div><span>Any PRTG user who is not restricted to read-only access and is permitted to create sensors (the default for non-read-only users) can pass %windowspassword as an argument to the demo VBScript sensor, triggering the type-mismatch error and causing PRTG to display the plaintext password in the sensor's error output.</span></div>"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://r.sec-consult.com/paessler",
                    "tags": [
                        "third-party-advisory"
                    ]
                },
                {
                    "url": "https://paessler.freshdesk.com/en/support/solutions/articles/76000088640",
                    "tags": [
                        "vendor-advisory"
                    ]
                },
                {
                    "url": "https://www.paessler.com/de/download/",
                    "tags": [
                        "patch"
                    ]
                },
                {
                    "url": "https://www.paessler.com/prtg/prtg-network-monitor",
                    "tags": [
                        "product"
                    ]
                }
            ],
            "metrics": [
                {
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ],
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "exploitMaturity": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "valueDensity": "NOT_DEFINED",
                        "vulnerabilityResponseEffort": "NOT_DEFINED",
                        "providerUrgency": "NOT_DEFINED",
                        "version": "4.0",
                        "baseSeverity": "HIGH",
                        "baseScore": 7.1,
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
                    }
                }
            ],
            "solutions": [
                {
                    "lang": "en",
                    "value": "Upgrade to Paessler PRTG Network Monitor version 26.2.120.1449 or later.",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "Upgrade to Paessler PRTG Network Monitor version 26.2.120.1449 or later."
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "J. Kruchem, SEC Consult Vulnerability Lab",
                    "type": "finder"
                },
                {
                    "lang": "en",
                    "value": "S. Michlits, SEC Consult Vulnerability Lab",
                    "type": "finder"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "x_generator": {
                "engine": "Vulnogram 1.0.5"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-24T12:13:17.297572Z",
                                "id": "CVE-2026-4638",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-24T12:14:20.861Z"
                }
            }
        ]
    }
}