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CVE-2026-79911

Estado: AplazadaCrítica (9.3)—

A security vulnerability has been detected in TOTOLINK N600R 4.3.0cu.7647_B20210106. The affected element is the function setSystemConfig of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument Hostname leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:N/PR:N/UI:N indica explotación remota sin privilegios (T1190). Stack overflow en CGI permite ejecución de código arbitrario (T1059). CWE-119/121 confirman desbordamiento de buffer.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementVulnerability ScanningRestrict Web-Based ContentNetwork SegmentationLimit Software InstallationLimit Access to Resource Over Network

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Totolink — N600rAI

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-79911",
  "cveTags": [],
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          "id": "CVE-2026-79911",
          "role": "CISA Coordinator",
          "options": [
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          "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
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        "obtainAllPrivilege": false,
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    "cvssMetricV31": [
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        "cvssData": {
          "scope": "CHANGED",
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          "attackVector": "NETWORK",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
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    "cvssMetricV40": [
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          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 9.3,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
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          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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",
          "exploitMaturity": "PROOF_OF_CONCEPT",
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          "modifiedAttackRequirements": "NOT_DEFINED",
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
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          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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      "affectedData": [
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          "cpes": [
            "cpe:2.3:o:totolink:n600r_firmware:*:*:*:*:*:*:*:*"
          ],
          "vendor": "TOTOLINK",
          "modules": [
            "CGI Handler"
          ],
          "product": "N600R",
          "versions": [
            {
              "status": "affected",
              "version": "4.3.0cu.7647_B20210106"
            }
          ]
        }
      ]
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  "published": "2026-08-25T23:17:59.490",
  "references": [
    {
      "url": "https://github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/main/TOTOLINK_N600R_cstecgi_strcpy_sprintf_Multi_Function_Stack_Overflow.md",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/cve/CVE-2026-79911",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/submit/881258",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/vuln/395061",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/vuln/395061/cti",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://www.totolink.net/",
      "source": "cna@vuldb.com"
    }
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  "weaknesses": [
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      "type": "Secondary",
      "source": "cna@vuldb.com",
      "description": [
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          "lang": "en",
          "value": "CWE-119"
        },
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A security vulnerability has been detected in TOTOLINK N600R 4.3.0cu.7647_B20210106. The affected element is the function setSystemConfig of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument Hostname leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used."
    }
  ],
  "lastModified": "2026-08-27T17:20:49.160",
  "sourceIdentifier": "cna@vuldb.com"
}