github - ghsa-chph-r4jm-2932

GHSA-CHPH-R4JM-2932

Vulnerability from github – Published: 2025-12-31 21:30 – Updated: 2025-12-31 21:30

Details

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.

Severity ?

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

8.7 (High)


                  
                    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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2021-47741"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-522"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-31T19:15:42Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-chph-r4jm-2932",
  "modified": "2025-12-31T21:30:57Z",
  "published": "2025-12-31T21:30:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47741"
    },
    {
      "type": "WEB",
      "url": "https://web.archive.org/web/20211220094023/http://www.wd-thailand.com"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/49737"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/zbl-epon-onu-broadband-router-vr-privilege-escalation-via-configuration-endpoint"
    },
    {
      "type": "WEB",
      "url": "https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5647.php"
    },
    {
      "type": "WEB",
      "url": "http://www.zblchina.com"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2021-47741 (GCVE-0-2021-47741)

Vulnerability from cvelistv5 – Published: 2025-12-31 18:39 – Updated: 2025-12-31 18:39

Title

ZBL EPON ONU Broadband Router V100R001 Privilege Escalation via Configuration Endpoint

Summary

Severity ?

8.7 (High)


                        
                          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

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE

CWE-522 - Insufficiently Protected Credentials

Assigner

VulnCheck

References

URL

Tags

	https://www.exploit-db.com/exploits/49737	exploit
	http://www.zblchina.com	product
	https://web.archive.org/web/20211220094023/http:/…	product
	https://www.zeroscience.mk/en/vulnerabilities/ZSL…	third-party-advisory
	https://www.vulncheck.com/advisories/zbl-epon-onu…	third-party-advisory

Impacted products

	Vendor	Product	Version
	Zblchina	ZBL EPON ONU Broadband Router	Affected: 1.0

Credits

LiquidWorm as Gjoko Krstic of Zero Science Lab

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "ZBL EPON ONU Broadband Router",
          "vendor": "Zblchina",
          "versions": [
            {
              "status": "affected",
              "version": "1.0"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "LiquidWorm as Gjoko Krstic of Zero Science Lab"
        }
      ],
      "datePublic": "2021-01-31T00:00:00.000Z",
      "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "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",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-522",
              "description": "Insufficiently Protected Credentials",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-31T18:39:10.193Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "ExploitDB-49737",
          "tags": [
            "exploit"
          ],
          "url": "https://www.exploit-db.com/exploits/49737"
        },
        {
          "name": "ZBL China Vendor Homepage",
          "tags": [
            "product"
          ],
          "url": "http://www.zblchina.com"
        },
        {
          "name": "Archived W\u0026D Thailand Vendor Homepage",
          "tags": [
            "product"
          ],
          "url": "https://web.archive.org/web/20211220094023/http://www.wd-thailand.com/"
        },
        {
          "name": "Zero Science Lab Disclosure (ZSL-2021-5647)",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5647.php"
        },
        {
          "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"
        }
      ],
      "title": "ZBL EPON ONU Broadband Router V100R001 Privilege Escalation via Configuration Endpoint",
      "x_generator": {
        "engine": "vulncheck"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2021-47741",
    "datePublished": "2025-12-31T18:39:10.193Z",
    "dateReserved": "2025-12-23T13:24:04.581Z",
    "dateUpdated": "2025-12-31T18:39:10.193Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-CHPH-R4JM-2932

CVE-2021-47741 (GCVE-0-2021-47741)

Tags

Sightings

Nomenclature