Vulnerability-Lookup

CNVD-2026-37300

Vulnerability from cnvd - Published: 2026-09-17

Title

TOTOLINK N600R加密问题漏洞

Description

TOTOLINK N600R是TOTOLINK品牌推出的一款面向家庭和小型办公环境的无线路由器‌。 TOTOLINK N600R存在加密问题漏洞，该漏洞源于身份验证模块在生成随机值时缺乏足够的随机性，导致可预测的随机值。攻击者可利用该漏洞远程预测认证令牌，从而绕过身份验证，获取敏感信息。

Severity

低

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/397071 https://vuldb.com/vuln/397071/cti https://vuldb.com/cve/CVE-2026-82555 https://vuldb.com/submit/891698 https://github.com/b1uerry/cves/tree/main/TOTOLINK/N600R/TOTOLINK_N600R_predictable-token https://github.com/b1uerry/cves/blob/main/TOTOLINK/N600R/TOTOLINK_N600R_predictable-token/poc.py https://www.totolink.net/

Impacted products

Name
TOTOLINK N600R 4.3.0cu.7866_B20220506

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-82555",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-82555"
    }
  },
  "description": "TOTOLINK N600R\u662fTOTOLINK\u54c1\u724c\u63a8\u51fa\u7684\u4e00\u6b3e\u9762\u5411\u5bb6\u5ead\u548c\u5c0f\u578b\u529e\u516c\u73af\u5883\u7684\u65e0\u7ebf\u8def\u7531\u5668\u200c\u3002\n\nTOTOLINK N600R\u5b58\u5728\u52a0\u5bc6\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u8eab\u4efd\u9a8c\u8bc1\u6a21\u5757\u5728\u751f\u6210\u968f\u673a\u503c\u65f6\u7f3a\u4e4f\u8db3\u591f\u7684\u968f\u673a\u6027\uff0c\u5bfc\u81f4\u53ef\u9884\u6d4b\u7684\u968f\u673a\u503c\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u8fdc\u7a0b\u9884\u6d4b\u8ba4\u8bc1\u4ee4\u724c\uff0c\u4ece\u800c\u7ed5\u8fc7\u8eab\u4efd\u9a8c\u8bc1\uff0c\u83b7\u53d6\u654f\u611f\u4fe1\u606f\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-2026-37300",
  "openTime": "2026-09-17",
  "products": {
    "product": "TOTOLINK N600R 4.3.0cu.7866_B20220506"
  },
  "referenceLink": "https://vuldb.com/vuln/397071\r\nhttps://vuldb.com/vuln/397071/cti\r\nhttps://vuldb.com/cve/CVE-2026-82555\r\nhttps://vuldb.com/submit/891698\r\nhttps://github.com/b1uerry/cves/tree/main/TOTOLINK/N600R/TOTOLINK_N600R_predictable-token\r\nhttps://github.com/b1uerry/cves/blob/main/TOTOLINK/N600R/TOTOLINK_N600R_predictable-token/poc.py\r\nhttps://www.totolink.net/",
  "serverity": "\u4f4e",
  "submitTime": "2026-08-31",
  "title": "TOTOLINK N600R\u52a0\u5bc6\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2026-82555 (GCVE-0-2026-82555)

Vulnerability from cvelistv5 – Published: 2026-08-30 17:30 – Updated: 2026-08-31 22:04

Title

TOTOLINK N600R Authentication cstecgi.cgi loginAuth random values

Summary

A vulnerability has been found in TOTOLINK N600R 4.3.0cu.7866_B20220506. This vulnerability affects the function loginAuth of the file /web_cste/cgi-bin/cstecgi.cgi of the component Authentication Handler. Such manipulation leads to insufficiently random values. It is possible to launch the attack remotely. This attack is characterized by high complexity. It is stated that the exploitability is difficult. The exploit has been disclosed to the public and may be used.

Severity

6.3 (Medium)


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

3.7 (Low)


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

3.7 (Low)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-31 21:50 UTC

CWE

CWE-330 - Insufficiently Random Values
CWE-310 - Cryptographic Issues

Assigner

VulDB CNA under the mitre root

CNA scorecard B 82/100 over 3840 records in the last 180 days details

References

7 references

URL	Tags
https://vuldb.com/vuln/397071	vdb-entrytechnical-description
https://vuldb.com/vuln/397071/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-82555	third-party-advisory
https://vuldb.com/submit/891698	third-party-advisory
https://github.com/b1uerry/cves/tree/main/TOTOLIN…	related
https://github.com/b1uerry/cves/blob/main/TOTOLIN…	exploit
https://www.totolink.net/	product

Impacted products

1 product

Vendor	Product	Version
TOTOLINK	N600R	Affected: 4.3.0cu.7866_B20220506 cpe:2.3:o:totolink:n600r_firmware::::::::

Credits

bluerry (VulDB User)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-82555",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-31T21:50:29.685518Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-31T22:04:18.589Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:o:totolink:n600r_firmware:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Authentication Handler"
          ],
          "product": "N600R",
          "vendor": "TOTOLINK",
          "versions": [
            {
              "status": "affected",
              "version": "4.3.0cu.7866_B20220506"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "bluerry (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability has been found in TOTOLINK N600R 4.3.0cu.7866_B20220506. This vulnerability affects the function loginAuth of the file /web_cste/cgi-bin/cstecgi.cgi of the component Authentication Handler. Such manipulation leads to insufficiently random values. It is possible to launch the attack remotely. This attack is characterized by high complexity. It is stated that the exploitability is difficult. The exploit has been disclosed to the public and may be used."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P",
            "version": "4.0"
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        },
        {
          "cvssV3_1": {
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            "baseSeverity": "LOW",
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            "version": "3.1"
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        },
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            "version": "3.0"
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        },
        {
          "cvssV2_0": {
            "baseScore": 2.6,
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      "problemTypes": [
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      "providerMetadata": {
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        },
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          "tags": [
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          ],
          "url": "https://vuldb.com/cve/CVE-2026-82555"
        },
        {
          "name": "Submit #891698 | TOTOLINK N600R v4.3.0cu.7866_B20220506 Use of Insufficiently Random Values",
          "tags": [
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          "url": "https://vuldb.com/submit/891698"
        },
        {
          "tags": [
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          "url": "https://github.com/b1uerry/cves/tree/main/TOTOLINK/N600R/TOTOLINK_N600R_predictable-token"
        },
        {
          "tags": [
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          "lang": "en",
          "time": "2026-08-29T21:00:03.000Z",
          "value": "VulDB entry last update"
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      ],
      "title": "TOTOLINK N600R Authentication cstecgi.cgi loginAuth random values",
      "x_generator": [
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  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
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    "datePublished": "2026-08-30T17:30:10.581Z",
    "dateReserved": "2026-08-29T18:54:51.440Z",
    "dateUpdated": "2026-08-31T22:04:18.589Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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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.

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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.
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