Vulnerability-Lookup

GHSA-PH8R-M79F-Q97V

Vulnerability from github – Published: 2026-08-30 18:33 – Updated: 2026-08-30 18:33

Details

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

3.7 (Low)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

2.9 (Low)


                  
                    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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-82555"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-30T18:17:00Z",
    "severity": "LOW"
  },
  "details": "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.",
  "id": "GHSA-ph8r-m79f-q97v",
  "modified": "2026-08-30T18:33:54Z",
  "published": "2026-08-30T18:33:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82555"
    },
    {
      "type": "WEB",
      "url": "https://github.com/b1uerry/cves/blob/main/TOTOLINK/N600R/TOTOLINK_N600R_predictable-token/poc.py"
    },
    {
      "type": "WEB",
      "url": "https://github.com/b1uerry/cves/tree/main/TOTOLINK/N600R/TOTOLINK_N600R_predictable-token"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-82555"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/891698"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/397071"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/397071/cti"
    },
    {
      "type": "WEB",
      "url": "https://www.totolink.net"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

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

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 mitre root

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": {
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        "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"
              },
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        "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",
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            }
          ]
        }
      ],
      "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": [
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          "cvssV4_0": {
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          "cvssV3_1": {
            "baseScore": 3.7,
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        },
        {
          "cvssV2_0": {
            "baseScore": 2.6,
            "vectorString": "AV:N/AC:H/Au:N/C:P/I:N/A:N/E:POC/RL:ND/RC:UR",
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      "providerMetadata": {
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          "tags": [
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          "url": "https://vuldb.com/vuln/397071/cti"
        },
        {
          "name": "CVE-2026-82555 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
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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",
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        },
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          "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",
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    "dateReserved": "2026-08-29T18:54:51.440Z",
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    "state": "PUBLISHED"
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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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.

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GHSA-PH8R-M79F-Q97V

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

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