Vulnerability-Lookup

VAR-202509-0021

Vulnerability from variot - Updated: 2025-09-26 23:37

A vulnerability was determined in TOTOLINK A702R 4.0.0-B20211108.1423. This issue affects the function sub_418030 of the file /boafrm/formParentControl. Executing manipulation of the argument submit-url can lead to buffer overflow. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. TOTOLINK of A702R The firmware contains a buffer error vulnerability and a classic buffer overflow vulnerability.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be in a state. The TOTOLINK A702R is a wireless router manufactured by China's TOTOLINK Electronics, primarily used for home network connectivity and signal coverage.

The TOTOLINK A702R suffers from a buffer overflow vulnerability caused by a failure to properly validate the length of input data in the submit-url parameter in the /boafrm/formParentControl file. This vulnerability could allow an attacker to execute arbitrary code on the system or cause a denial of service

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CVE-2025-9783 (GCVE-0-2025-9783)

Vulnerability from cvelistv5 – Published: 2025-09-01 14:32 – Updated: 2025-09-02 18:50

Title

TOTOLINK A702R formParentControl sub_418030 buffer overflow

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/E:P

8.8 (High)


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

8.8 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-09-02 18:41 UTC

CWE

CWE-120 - Buffer Overflow
CWE-119 - Memory Corruption

Assigner

VulDB mitre root Scorecard

References

6 references

URL	Tags
https://vuldb.com/?id.322085	vdb-entrytechnical-description
https://vuldb.com/?ctiid.322085	signaturepermissions-required
https://vuldb.com/?submit.640991	third-party-advisory
https://github.com/rew1X/CVE/blob/main/TOTOLINK/A…	related
https://github.com/rew1X/CVE/blob/main/TOTOLINK/A…	exploit
https://www.totolink.net/	product

Impacted products

1 product

Vendor	Product	Version
TOTOLINK	A702R	Affected: 4.0.0-B20211108.1423

Credits

rew1X (VulDB User)

Show details on NVD website

JSON

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            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "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/E:P",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 9,
            "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-120",
              "description": "Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-119",
              "description": "Memory Corruption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-01T14:32:07.404Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-322085 | TOTOLINK A702R formParentControl sub_418030 buffer overflow",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/?id.322085"
        },
        {
          "name": "VDB-322085 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/?ctiid.322085"
        },
        {
          "name": "Submit #640991 | TOTOLINK A702R V4.0.0-B20211108.1423 Buffer Overflow",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/?submit.640991"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://github.com/rew1X/CVE/blob/main/TOTOLINK/A702R/formParentControl/formParentControl.md"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://github.com/rew1X/CVE/blob/main/TOTOLINK/A702R/formParentControl/formParentControl.md#poc"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://www.totolink.net/"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2025-09-01T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2025-09-01T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2025-09-01T07:14:31.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "TOTOLINK A702R formParentControl sub_418030 buffer overflow"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2025-9783",
    "datePublished": "2025-09-01T14:32:07.404Z",
    "dateReserved": "2025-09-01T05:09:15.796Z",
    "dateUpdated": "2025-09-02T18:50:55.424Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

VAR-202509-0021

CVE-2025-9783 (GCVE-0-2025-9783)

Tags

Sightings

Nomenclature

Related by attack behaviour