Vulnerability-Lookup

CNVD-2026-32744

Vulnerability from cnvd - Published: 2026-08-19

Title

TOTOLINK N300RH缓冲区溢出漏洞

Description

TOTOLINK N300RH是TOTOLINK品牌推出的一款‌300Mbps单频长距离无线路由器‌，基于IEEE802.11n标准，专为增强无线覆盖范围设计。 TOTOLINK N300RH存在缓冲区溢出漏洞，该漏洞源于setWanConfig函数未能正确验证参数priDns的长度，攻击者可利用该漏洞通过远程发送特制POST请求执行任意代码。

Severity

高

Formal description

目前厂商尚未发布升级程序修复该安全问题，详情见厂商官网： https://www.totolink.net/

Reference

https://vuldb.com/vuln/360924

Impacted products

Name
TOTOLINK N300RH 3.2.4-B20220812

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JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-7749",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-7749"
    }
  },
  "description": "TOTOLINK N300RH\u662fTOTOLINK\u54c1\u724c\u63a8\u51fa\u7684\u4e00\u6b3e\u200c300Mbps\u5355\u9891\u957f\u8ddd\u79bb\u65e0\u7ebf\u8def\u7531\u5668\u200c\uff0c\u57fa\u4e8eIEEE802.11n\u6807\u51c6\uff0c\u4e13\u4e3a\u589e\u5f3a\u65e0\u7ebf\u8986\u76d6\u8303\u56f4\u8bbe\u8ba1\u3002\n\nTOTOLINK N300RH\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8esetWanConfig\u51fd\u6570\u672a\u80fd\u6b63\u786e\u9a8c\u8bc1\u53c2\u6570priDns\u7684\u957f\u5ea6\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u8fdc\u7a0b\u53d1\u9001\u7279\u5236POST\u8bf7\u6c42\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5c1a\u672a\u53d1\u5e03\u5347\u7ea7\u7a0b\u5e8f\u4fee\u590d\u8be5\u5b89\u5168\u95ee\u9898\uff0c\u8be6\u60c5\u89c1\u5382\u5546\u5b98\u7f51\uff1a\r\nhttps://www.totolink.net/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-32744",
  "openTime": "2026-08-19",
  "products": {
    "product": "TOTOLINK N300RH 3.2.4-B20220812"
  },
  "referenceLink": "https://vuldb.com/vuln/360924",
  "serverity": "\u9ad8",
  "submitTime": "2026-05-06",
  "title": "TOTOLINK N300RH\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e"
}

CVE-2026-7749 (GCVE-0-2026-7749)

Vulnerability from cvelistv5 – Published: 2026-05-04 08:45 – Updated: 2026-05-05 00:59

Title

Totolink N300RH POST Request cstecgi.cgi setWanConfig buffer overflow

Summary

A security vulnerability has been detected in Totolink N300RH 3.2.4-B20220812. This affects the function setWanConfig of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument priDns leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used.

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 2026-05-05 00:59 UTC

CWE

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

Assigner

VulDB mitre root

References

5 references

URL	Tags
https://vuldb.com/vuln/360924	vdb-entrytechnical-description
https://vuldb.com/vuln/360924/cti	signaturepermissions-required
https://vuldb.com/submit/807203	third-party-advisory
https://lavender-bicycle-a5a.notion.site/TOTOLINK…	exploit
https://www.totolink.net/	product

Impacted products

1 product

Vendor	Product	Version
Totolink	N300RH	Affected: 3.2.4-B20220812 cpe:2.3:o:totolink:n300rh_firmware::::::::

Credits

wxhwxhwxh_mie (VulDB User)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-7749",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-05T00:59:21.186782Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-05T00:59:31.608Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:o:totolink:n300rh_firmware:*:*:*:*:*:*:*:*"
          ],
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            "POST Request Handler"
          ],
          "product": "N300RH",
          "vendor": "Totolink",
          "versions": [
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              "version": "3.2.4-B20220812"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "wxhwxhwxh_mie (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A security vulnerability has been detected in Totolink N300RH 3.2.4-B20220812. This affects the function setWanConfig of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument priDns leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used."
        }
      ],
      "metrics": [
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          "cvssV4_0": {
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
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          "url": "https://vuldb.com/vuln/360924/cti"
        },
        {
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}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

CNVD-2026-32744

CVE-2026-7749 (GCVE-0-2026-7749)

Tags

Sightings

Nomenclature