Vulnerability-Lookup

VAR-202507-2330

Vulnerability from variot - Updated: 2025-08-09 23:11

A vulnerability has been found in TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical. Affected by this vulnerability is the function setTelnetCfg of the file /cgi-bin/cstecgi.cgi of the component Telnet Service. The manipulation of the argument telnet_enabled with the input 1 leads to missing authentication. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. TOTOLINK of t6 The firmware contains vulnerabilities related to authentication and lack of authentication for critical functions.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be in a state. The TOTOLINK T6 is a wireless dual-band router released by China's TOTOLINK Electronics. It supports the MQTT protocol and Telnet service. No detailed vulnerability details are currently available

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CVE-2025-7862 (GCVE-0-2025-7862)

Vulnerability from cvelistv5 – Published: 2025-07-20 02:02 – Updated: 2025-07-22 14:14

Title

TOTOLINK T6 Telnet Service cstecgi.cgi setTelnetCfg missing authentication

Summary

Severity ?

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

7.3 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:W/RC:R

7.3 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:W/RC:R

CWE

CWE-306 - Missing Authentication
CWE-287 - Improper Authentication

Assigner

VulDB

References

URL

Tags

	https://vuldb.com/?id.316975	vdb-entrytechnical-description
	https://vuldb.com/?ctiid.316975	signaturepermissions-required
	https://vuldb.com/?submit.617643	third-party-advisory
	https://github.com/AnduinBrian/Public/blob/main/T…	related
	https://github.com/AnduinBrian/Public/blob/main/T…	exploit
	https://www.youtube.com/watch?v=XeKu3tfeSME	media-coverage
	https://www.totolink.net/	product

Impacted products

	Vendor	Product	Version
	TOTOLINK	T6	Affected: 4.1.5cu.748_B20211015

Credits

reisen_1943 (VulDB User)

Show details on NVD website

JSON

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            "url": "https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "modules": [
            "Telnet Service"
          ],
          "product": "T6",
          "vendor": "TOTOLINK",
          "versions": [
            {
              "status": "affected",
              "version": "4.1.5cu.748_B20211015"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "reisen_1943 (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability has been found in TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical. Affected by this vulnerability is the function setTelnetCfg of the file /cgi-bin/cstecgi.cgi of the component Telnet Service. The manipulation of the argument telnet_enabled with the input 1 leads to missing authentication. The attack can be launched remotely. The exploit has been disclosed to the public and may be used."
        },
        {
          "lang": "de",
          "value": "In TOTOLINK T6 4.1.5cu.748_B20211015 wurde eine Schwachstelle gefunden. Sie wurde als kritisch eingestuft. Es geht um die Funktion setTelnetCfg der Datei /cgi-bin/cstecgi.cgi der Komponente Telnet Service. Durch Beeinflussen des Arguments telnet_enabled mit der Eingabe 1 mit unbekannten Daten kann eine missing authentication-Schwachstelle ausgenutzt werden. Der Angriff kann \u00fcber das Netzwerk erfolgen. Der Exploit steht zur \u00f6ffentlichen Verf\u00fcgung."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:W/RC:R",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:W/RC:R",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 7.5,
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:W/RC:UR",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-306",
              "description": "Missing Authentication",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "Improper Authentication",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-20T02:02:08.415Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-316975 | TOTOLINK T6 Telnet Service cstecgi.cgi setTelnetCfg missing authentication",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/?id.316975"
        },
        {
          "name": "VDB-316975 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/?ctiid.316975"
        },
        {
          "name": "Submit #617643 | TOTOLINK T6 V4.1.5cu.748_B20211015 Missing Authentication",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/?submit.617643"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md#poc-http"
        },
        {
          "tags": [
            "media-coverage"
          ],
          "url": "https://www.youtube.com/watch?v=XeKu3tfeSME"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://www.totolink.net/"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2025-07-19T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2025-07-19T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2025-07-19T06:14:27.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "TOTOLINK T6 Telnet Service cstecgi.cgi setTelnetCfg missing authentication"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2025-7862",
    "datePublished": "2025-07-20T02:02:08.415Z",
    "dateReserved": "2025-07-19T04:09:11.406Z",
    "dateUpdated": "2025-07-22T14:14:27.289Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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

VAR-202507-2330

CVE-2025-7862 (GCVE-0-2025-7862)

Tags

Sightings

Nomenclature