{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-74233",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-08-14T18:01:19.917Z",
        "datePublished": "2026-08-27T10:40:11.313Z",
        "dateUpdated": "2026-08-27T13:41:32.924Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
                "shortName": "VulnCheck",
                "dateUpdated": "2026-08-27T10:40:11.313Z"
            },
            "title": "Zbtlink MQWrt infosrvd Command Injection",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Zbtlink WE1326, WE357, WE5926, WE5926-WD, WE826-Q, WE826-T2, WE826-WD, WG108, and WG3526 firmware 19.1101, Zbtlink WE2426-C firmware 19.1112, Zbtlink WE5926-EC_QP firmware 20.0516, Zbtlink WF3526-P firmware 19.051, CTN720-W1, LF-1541, and MT7620N firmware 19.1101, and WRC1 firmware 20.0622 contain an unauthenticated command injection in the infosrvd service (UDP/9992). A remote unauthenticated attacker can send a crafted UDP packet to execute arbitrary commands as root. The service's authentication uses a hardcoded salt and an all-zero wildcard MAC bypass, rendering it ineffective."
                }
            ],
            "datePublic": "2026-08-27T00:00:00.000Z",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-321",
                            "description": "Use of Hard-coded Cryptographic Key",
                            "type": "CWE"
                        },
                        {
                            "lang": "en",
                            "cweId": "CWE-78",
                            "description": "Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "Zbtlink",
                    "product": "WE1326",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "19.1101",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unknown"
                },
                {
                    "vendor": "Zbtlink",
                    "product": "WE2426-C",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "19.1112",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unknown"
                },
                {
                    "vendor": "Zbtlink",
                    "product": "WE357",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "19.1101",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unknown"
                },
                {
                    "vendor": "Zbtlink",
                    "product": "WE5926",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "19.1101",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unknown"
                },
                {
                    "vendor": "Zbtlink",
                    "product": "WE5926-EC_QP",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "20.0516",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unknown"
                },
                {
                    "vendor": "Zbtlink",
                    "product": "WE5926-WD",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "19.1101",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unknown"
                },
                {
                    "vendor": "Zbtlink",
                    "product": "WE826-Q",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "19.1101",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unknown"
                },
                {
                    "vendor": "Zbtlink",
                    "product": "WE826-T2",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "19.1101",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unknown"
                },
                {
                    "vendor": "Zbtlink",
                    "product": "WE826-WD",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "19.1101",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unknown"
                },
                {
                    "vendor": "Zbtlink",
                    "product": "WF3526-P",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "19.051",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unknown"
                },
                {
                    "vendor": "Zbtlink",
                    "product": "WG108",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "19.1101",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unknown"
                },
                {
                    "vendor": "Zbtlink",
                    "product": "WG3526",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "19.1101",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unknown"
                },
                {
                    "vendor": "Unknown",
                    "product": "CTN720-W1",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "19.1101",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unknown"
                },
                {
                    "vendor": "Unknown",
                    "product": "LF-1541",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "19.1101",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unknown"
                },
                {
                    "vendor": "Unknown",
                    "product": "MT7620N",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "19.1101",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unknown"
                },
                {
                    "vendor": "Unknown",
                    "product": "WRC1",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "20.0622",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unknown"
                }
            ],
            "metrics": [
                {
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ],
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "HIGH",
                        "subIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "HIGH",
                        "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": "CRITICAL",
                        "baseScore": 9.3,
                        "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"
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                },
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                    "cvssV3_1": {
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                        "attackComplexity": "LOW",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "availabilityImpact": "HIGH",
                        "version": "3.1",
                        "baseSeverity": "CRITICAL",
                        "baseScore": 9.8,
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
                    }
                }
            ],
            "references": [
                {
                    "url": "http://vulncheck.com/blog/zbt-darklantern-speakingstone",
                    "name": "VulnCheck Blog",
                    "tags": [
                        "technical-description",
                        "exploit"
                    ]
                },
                {
                    "url": "https://www.vulncheck.com/advisories/zbtlink-mqwrt-infosrvd-command-injection",
                    "tags": [
                        "third-party-advisory"
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Jacob Baines of VulnCheck",
                    "type": "finder"
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "x_generator": {
                "engine": "Vulnogram 1.0.4"
            },
            "impacts": [
                {
                    "capecId": "CAPEC-88",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-88 OS Command Injection"
                        }
                    ]
                }
            ]
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-27T13:41:26.633961Z",
                                "id": "CVE-2026-74233",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-08-27T13:41:32.924Z"
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}