VAR-202504-3463

Vulnerability from variot - Updated: 2025-05-10 23:09

TOTOLINK A800R V4.1.2cu.5137_B20200730 was found to contain a buffer overflow vulnerability in downloadFile.cgi through the v25 parameter. TOTOLINK of a800r Firmware has a classic buffer overflow vulnerability.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be in a state. TOTOLINK A800R is a wireless router from China's TOTOLINK Electronics. The vulnerability is caused by the failure of the v25 parameter in downloadFile.cgi to correctly verify the length of the input data. Remote attackers can exploit this vulnerability to execute arbitrary code on the system or cause a denial of service attack

Show details on source website
To clipboard 

{
  "@context": {
    "@vocab": "https://www.variotdbs.pl/ref/VARIoTentry#",
    "affected_products": {
      "@id": "https://www.variotdbs.pl/ref/affected_products"
    },
    "credits": {
      "@id": "https://www.variotdbs.pl/ref/credits"
    },
    "cvss": {
      "@id": "https://www.variotdbs.pl/ref/cvss/"
    },
    "description": {
      "@id": "https://www.variotdbs.pl/ref/description/"
    },
    "exploit_availability": {
      "@id": "https://www.variotdbs.pl/ref/exploit_availability/"
    },
    "external_ids": {
      "@id": "https://www.variotdbs.pl/ref/external_ids/"
    },
    "iot": {
      "@id": "https://www.variotdbs.pl/ref/iot/"
    },
    "iot_taxonomy": {
      "@id": "https://www.variotdbs.pl/ref/iot_taxonomy/"
    },
    "patch": {
      "@id": "https://www.variotdbs.pl/ref/patch/"
    },
    "problemtype_data": {
      "@id": "https://www.variotdbs.pl/ref/problemtype_data/"
    },
    "references": {
      "@id": "https://www.variotdbs.pl/ref/references/"
    },
    "sources": {
      "@id": "https://www.variotdbs.pl/ref/sources/"
    },
    "sources_release_date": {
      "@id": "https://www.variotdbs.pl/ref/sources_release_date/"
    },
    "sources_update_date": {
      "@id": "https://www.variotdbs.pl/ref/sources_update_date/"
    },
    "threat_type": {
      "@id": "https://www.variotdbs.pl/ref/threat_type/"
    },
    "title": {
      "@id": "https://www.variotdbs.pl/ref/title/"
    },
    "type": {
      "@id": "https://www.variotdbs.pl/ref/type/"
    }
  },
  "@id": "https://www.variotdbs.pl/vuln/VAR-202504-3463",
  "affected_products": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/affected_products#",
      "data": {
        "@container": "@list"
      },
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        },
        "@id": "https://www.variotdbs.pl/ref/sources"
      }
    },
    "data": [
      {
        "model": "a800r",
        "scope": "eq",
        "trust": 1.0,
        "vendor": "totolink",
        "version": "4.1.2cu.5137_b20200730"
      },
      {
        "model": "a800r",
        "scope": null,
        "trust": 0.8,
        "vendor": "totolink",
        "version": null
      },
      {
        "model": "a800r",
        "scope": "eq",
        "trust": 0.8,
        "vendor": "totolink",
        "version": "a800r  firmware  4.1.2cu.5137 b20200730"
      },
      {
        "model": "a800r",
        "scope": "eq",
        "trust": 0.8,
        "vendor": "totolink",
        "version": null
      },
      {
        "model": "a800r v4.1.2cu.5137 b20200730",
        "scope": null,
        "trust": 0.6,
        "vendor": "totolink",
        "version": null
      }
    ],
    "sources": [
      {
        "db": "CNVD",
        "id": "CNVD-2025-09282"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2025-004360"
      },
      {
        "db": "NVD",
        "id": "CVE-2025-28020"
      }
    ]
  },
  "cve": "CVE-2025-28020",
  "cvss": {
    "@context": {
      "cvssV2": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/cvss/cvssV2#"
        },
        "@id": "https://www.variotdbs.pl/ref/cvss/cvssV2"
      },
      "cvssV3": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/cvss/cvssV3#"
        },
        "@id": "https://www.variotdbs.pl/ref/cvss/cvssV3/"
      },
      "severity": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/cvss/severity#"
        },
        "@id": "https://www.variotdbs.pl/ref/cvss/severity"
      },
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        },
        "@id": "https://www.variotdbs.pl/ref/sources"
      }
    },
    "data": [
      {
        "cvssV2": [
          {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "author": "CNVD",
            "availabilityImpact": "PARTIAL",
            "baseScore": 7.5,
            "confidentialityImpact": "PARTIAL",
            "exploitabilityScore": 10.0,
            "id": "CNVD-2025-09282",
            "impactScore": 6.4,
            "integrityImpact": "PARTIAL",
            "severity": "HIGH",
            "trust": 0.6,
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
            "version": "2.0"
          }
        ],
        "cvssV3": [
          {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "author": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "availabilityImpact": "LOW",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "exploitabilityScore": 3.9,
            "id": "CVE-2025-28020",
            "impactScore": 3.4,
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "trust": 1.0,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.1"
          },
          {
            "attackComplexity": "Low",
            "attackVector": "Network",
            "author": "OTHER",
            "availabilityImpact": "Low",
            "baseScore": 7.3,
            "baseSeverity": "High",
            "confidentialityImpact": "Low",
            "exploitabilityScore": null,
            "id": "JVNDB-2025-004360",
            "impactScore": null,
            "integrityImpact": "Low",
            "privilegesRequired": "None",
            "scope": "Unchanged",
            "trust": 0.8,
            "userInteraction": "None",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.0"
          }
        ],
        "severity": [
          {
            "author": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "id": "CVE-2025-28020",
            "trust": 1.0,
            "value": "HIGH"
          },
          {
            "author": "OTHER",
            "id": "JVNDB-2025-004360",
            "trust": 0.8,
            "value": "High"
          },
          {
            "author": "CNVD",
            "id": "CNVD-2025-09282",
            "trust": 0.6,
            "value": "HIGH"
          }
        ]
      }
    ],
    "sources": [
      {
        "db": "CNVD",
        "id": "CNVD-2025-09282"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2025-004360"
      },
      {
        "db": "NVD",
        "id": "CVE-2025-28020"
      }
    ]
  },
  "description": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/description#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": "TOTOLINK A800R V4.1.2cu.5137_B20200730 was found to contain a buffer overflow vulnerability in downloadFile.cgi through the v25 parameter. TOTOLINK of a800r Firmware has a classic buffer overflow vulnerability.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be in a state. TOTOLINK A800R is a wireless router from China\u0027s TOTOLINK Electronics. The vulnerability is caused by the failure of the v25 parameter in downloadFile.cgi to correctly verify the length of the input data. Remote attackers can exploit this vulnerability to execute arbitrary code on the system or cause a denial of service attack",
    "sources": [
      {
        "db": "NVD",
        "id": "CVE-2025-28020"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2025-004360"
      },
      {
        "db": "CNVD",
        "id": "CNVD-2025-09282"
      }
    ],
    "trust": 2.16
  },
  "external_ids": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/external_ids#",
      "data": {
        "@container": "@list"
      },
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": [
      {
        "db": "NVD",
        "id": "CVE-2025-28020",
        "trust": 3.2
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2025-004360",
        "trust": 0.8
      },
      {
        "db": "CNVD",
        "id": "CNVD-2025-09282",
        "trust": 0.6
      }
    ],
    "sources": [
      {
        "db": "CNVD",
        "id": "CNVD-2025-09282"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2025-004360"
      },
      {
        "db": "NVD",
        "id": "CVE-2025-28020"
      }
    ]
  },
  "id": "VAR-202504-3463",
  "iot": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/iot#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": true,
    "sources": [
      {
        "db": "CNVD",
        "id": "CNVD-2025-09282"
      }
    ],
    "trust": 1.2136364
  },
  "iot_taxonomy": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/iot_taxonomy#",
      "data": {
        "@container": "@list"
      },
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": [
      {
        "category": [
          "Network device"
        ],
        "sub_category": null,
        "trust": 0.6
      }
    ],
    "sources": [
      {
        "db": "CNVD",
        "id": "CNVD-2025-09282"
      }
    ]
  },
  "last_update_date": "2025-05-10T23:09:58.827000Z",
  "problemtype_data": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/problemtype_data#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": [
      {
        "problemtype": "CWE-120",
        "trust": 1.0
      },
      {
        "problemtype": "Classic buffer overflow (CWE-120) [ others ]",
        "trust": 0.8
      }
    ],
    "sources": [
      {
        "db": "JVNDB",
        "id": "JVNDB-2025-004360"
      },
      {
        "db": "NVD",
        "id": "CVE-2025-28020"
      }
    ]
  },
  "references": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/references#",
      "data": {
        "@container": "@list"
      },
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": [
      {
        "trust": 1.8,
        "url": "https://locrian-lightning-dc7.notion.site/bufferoverflow3-1948e5e2b1a280c28ef5c6e54b49324d?pvs=73"
      },
      {
        "trust": 1.8,
        "url": "https://locrian-lightning-dc7.notion.site/cve-2025-28020-bufferoverflow3-1948e5e2b1a280c28ef5c6e54b49324d"
      },
      {
        "trust": 1.4,
        "url": "https://nvd.nist.gov/vuln/detail/cve-2025-28020"
      }
    ],
    "sources": [
      {
        "db": "CNVD",
        "id": "CNVD-2025-09282"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2025-004360"
      },
      {
        "db": "NVD",
        "id": "CVE-2025-28020"
      }
    ]
  },
  "sources": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/sources#",
      "data": {
        "@container": "@list"
      }
    },
    "data": [
      {
        "db": "CNVD",
        "id": "CNVD-2025-09282"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2025-004360"
      },
      {
        "db": "NVD",
        "id": "CVE-2025-28020"
      }
    ]
  },
  "sources_release_date": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/sources_release_date#",
      "data": {
        "@container": "@list"
      }
    },
    "data": [
      {
        "date": "2025-05-08T00:00:00",
        "db": "CNVD",
        "id": "CNVD-2025-09282"
      },
      {
        "date": "2025-05-07T00:00:00",
        "db": "JVNDB",
        "id": "JVNDB-2025-004360"
      },
      {
        "date": "2025-04-23T17:16:53.027000",
        "db": "NVD",
        "id": "CVE-2025-28020"
      }
    ]
  },
  "sources_update_date": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/sources_update_date#",
      "data": {
        "@container": "@list"
      }
    },
    "data": [
      {
        "date": "2025-05-09T00:00:00",
        "db": "CNVD",
        "id": "CNVD-2025-09282"
      },
      {
        "date": "2025-05-07T05:30:00",
        "db": "JVNDB",
        "id": "JVNDB-2025-004360"
      },
      {
        "date": "2025-05-06T20:35:33.377000",
        "db": "NVD",
        "id": "CVE-2025-28020"
      }
    ]
  },
  "title": {
    "@context": {
      "@vocab": "https://www.variotdbs.pl/ref/title#",
      "sources": {
        "@container": "@list",
        "@context": {
          "@vocab": "https://www.variotdbs.pl/ref/sources#"
        }
      }
    },
    "data": "TOTOLINK\u00a0 of \u00a0a800r\u00a0 Classic buffer overflow vulnerability in firmware",
    "sources": [
      {
        "db": "JVNDB",
        "id": "JVNDB-2025-004360"
      }
    ],
    "trust": 0.8
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.