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    "cveMetadata": {
        "cveId": "CVE-2021-47741",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2025-12-23T13:24:04.581Z",
        "datePublished": "2025-12-31T18:39:10.193Z",
        "dateUpdated": "2026-01-02T20:06:59.504Z"
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                "dateUpdated": "2025-12-31T18:39:10.193Z"
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            "datePublic": "2021-01-31T00:00:00.000Z",
            "title": "ZBL EPON ONU Broadband Router V100R001 Privilege Escalation via Configuration Endpoint",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "ZBL EPON ONU Broadband Router V100R001 contains a privilege escalation vulnerability that allows limited administrative users to elevate access by sending requests to configuration endpoints. Attackers can exploit the vulnerability by accessing the configuration backup or password page to disclose the super user password and gain additional privileged functionalities."
                }
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            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Insufficiently Protected Credentials",
                            "cweId": "CWE-522",
                            "type": "CWE"
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            "affected": [
                {
                    "vendor": "Zblchina",
                    "product": "ZBL EPON ONU Broadband Router",
                    "versions": [
                        {
                            "version": "1.0",
                            "status": "affected"
                        }
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                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "attackVector": "NETWORK",
                        "baseScore": 8.7,
                        "baseSeverity": "HIGH",
                        "exploitMaturity": "NOT_DEFINED",
                        "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",
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                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnerabilityResponseEffort": "NOT_DEFINED"
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                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "NONE",
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                        "scope": "UNCHANGED",
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                        "version": "3.1"
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                    "format": "CVSS"
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            "references": [
                {
                    "url": "https://www.exploit-db.com/exploits/49737",
                    "name": "ExploitDB-49737",
                    "tags": [
                        "exploit"
                    ]
                },
                {
                    "url": "http://www.zblchina.com",
                    "name": "ZBL China Vendor Homepage",
                    "tags": [
                        "product"
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                },
                {
                    "url": "https://web.archive.org/web/20211220094023/http://www.wd-thailand.com/",
                    "name": "Archived W&D Thailand Vendor Homepage",
                    "tags": [
                        "product"
                    ]
                },
                {
                    "url": "https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5647.php",
                    "name": "Zero Science Lab Disclosure (ZSL-2021-5647)",
                    "tags": [
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                },
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                    "name": "VulnCheck Advisory: ZBL EPON ONU Broadband Router V100R001 Privilege Escalation via Configuration Endpoint",
                    "tags": [
                        "third-party-advisory"
                    ],
                    "url": "https://www.vulncheck.com/advisories/zbl-epon-onu-broadband-router-vr-privilege-escalation-via-configuration-endpoint"
                }
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            "credits": [
                {
                    "lang": "en",
                    "value": "LiquidWorm as Gjoko Krstic of Zero Science Lab",
                    "type": "finder"
                }
            ],
            "x_generator": {
                "engine": "vulncheck"
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        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-01-02T20:06:38.476226Z",
                                "id": "CVE-2021-47741",
                                "options": [
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                                        "Exploitation": "poc"
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                                        "Technical Impact": "total"
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                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
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                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
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