{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-66842",
        "assignerOrgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab",
        "state": "PUBLISHED",
        "assignerShortName": "f5",
        "dateReserved": "2026-07-29T19:42:42.204Z",
        "datePublished": "2026-09-02T15:40:53.769Z",
        "dateUpdated": "2026-09-03T03:56:29.619Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "defaultStatus": "unknown",
                    "modules": [
                        "ALL"
                    ],
                    "product": "BIG-IP",
                    "vendor": "F5",
                    "versions": [
                        {
                            "lessThan": "21.1.0.1",
                            "status": "affected",
                            "version": "21.1.0",
                            "versionType": "custom"
                        },
                        {
                            "lessThan": "21.0.0.3",
                            "status": "affected",
                            "version": "21.0.0",
                            "versionType": "custom"
                        },
                        {
                            "lessThan": "17.5.1.8",
                            "status": "affected",
                            "version": "17.5.0",
                            "versionType": "custom"
                        },
                        {
                            "lessThan": "17.1.3.4",
                            "status": "affected",
                            "version": "17.1.0",
                            "versionType": "custom"
                        }
                    ]
                },
                {
                    "defaultStatus": "unaffected",
                    "modules": [
                        "TMOS"
                    ],
                    "product": "BIG-IQ",
                    "vendor": "F5",
                    "versions": [
                        {
                            "lessThan": "8.4.2.1",
                            "status": "affected",
                            "version": "8.4.0",
                            "versionType": "custom"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "reporter",
                    "value": "F5 acknowledges Dan Stefan Alexandru of Pentest-Tools for bringing this issue to our attention and following the highest standards of coordinated disclosure."
                }
            ],
            "datePublic": "2026-08-19T14:00:00.000Z",
            "descriptions": [
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                    "lang": "en",
                    "supportingMedia": [
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                            "type": "text/html",
                            "value": "<div>BIG-IP has a vulnerability where an authenticated user of any role may be able to create administrative user accounts through an undisclosed request to Traffic Management User Interface (TMUI).</div><div><br></div><div>Impact:</div><div>This vulnerability may allow an authenticated attacker with network access to the BIG-IP management interface to escalate privileges by creating administrative accounts on the BIG-IP system. There is no data plane exposure; this is a control plane issue only.</div><div><br></div><div>Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.</div>"
                        }
                    ],
                    "value": "BIG-IP has a vulnerability where an authenticated user of any role may be able to create administrative user accounts through an undisclosed request to Traffic Management User Interface (TMUI).\n\n\n\n\nImpact:\n\nThis vulnerability may allow an authenticated attacker with network access to the BIG-IP management interface to escalate privileges by creating administrative accounts on the BIG-IP system. There is no data plane exposure; this is a control plane issue only.\n\n\n\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "version": "3.1"
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
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                    ]
                },
                {
                    "cvssV4_0": {
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "attackVector": "NETWORK",
                        "baseScore": 8.7,
                        "baseSeverity": "HIGH",
                        "privilegesRequired": "LOW",
                        "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:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                        "version": "4.0",
                        "vulnAvailabilityImpact": "HIGH",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnerabilityResponseEffort": "NOT_DEFINED"
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-918",
                            "description": "CWE-918 Server-Side Request Forgery (SSRF)",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab",
                "shortName": "f5",
                "dateUpdated": "2026-09-02T15:40:53.769Z"
            },
            "references": [
                {
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://my.f5.com/manage/s/article/K000162521"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "title": "BIG-IP and BIG-IQ Configuration utility vulnerability",
            "workarounds": [
                {
                    "lang": "en",
                    "supportingMedia": [
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                            "base64": false,
                            "type": "text/html",
                            "value": "None"
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                    ],
                    "value": "None"
                }
            ],
            "x_generator": {
                "engine": "F5 SIRTBot v1.0"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-02T00:00:00+00:00",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3",
                                "id": "CVE-2026-66842"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-03T03:56:29.619Z"
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