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CVE-2026-9457

Status: DeferredHigh (8.9)—

A vulnerability was determined in Totolink A8000RU 7.1cu.643_b20200521. The affected element is the function UploadFirmwareFile of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. This manipulation of the argument FileName causes os command injection. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Vector CVSS AV:N/PR:N/UI:N indica explotación remota sin autenticación (T1190). CWE-77/78 y descripción explícita de 'os command injection' confirman ejecución de comandos (T1059) como impacto.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

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

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Totolink — A8000ruAI

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-9457",
  "cveTags": [],
  "metrics": {
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          "options": [
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              "exploitation": "poc"
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          "version": "2.0.3",
          "timestamp": "2026-05-26T14:53:38.324229Z"
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    "cvssMetricV31": [
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        "type": "Secondary",
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          "scope": "UNCHANGED",
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    "cvssMetricV40": [
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        "type": "Secondary",
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        "cvssData": {
          "Safety": "NOT_DEFINED",
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          "Recovery": "NOT_DEFINED",
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          "Automatable": "NOT_DEFINED",
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          "valueDensity": "NOT_DEFINED",
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          "exploitMaturity": "PROOF_OF_CONCEPT",
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          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "modifiedUserInteraction": "NOT_DEFINED",
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          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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  },
  "affected": [
    {
      "source": "cna@vuldb.com",
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:o:totolink:a8000ru_firmware:*:*:*:*:*:*:*:*"
          ],
          "vendor": "Totolink",
          "modules": [
            "Web Management Interface"
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          "product": "A8000RU",
          "versions": [
            {
              "status": "affected",
              "version": "7.1cu.643_b20200521"
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      ]
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  "published": "2026-05-25T14:16:28.683",
  "references": [
    {
      "url": "https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_343/README.md",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/submit/813454",
      "source": "cna@vuldb.com"
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    {
      "url": "https://vuldb.com/vuln/365438",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://vuldb.com/vuln/365438/cti",
      "source": "cna@vuldb.com"
    },
    {
      "url": "https://www.totolink.net/",
      "source": "cna@vuldb.com"
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          "value": "CWE-77"
        },
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was determined in Totolink A8000RU 7.1cu.643_b20200521. The affected element is the function UploadFirmwareFile of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. This manipulation of the argument FileName causes os command injection. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized."
    },
    {
      "lang": "es",
      "value": "Se determinó una vulnerabilidad en Totolink A8000RU 7.1cu.643_b20200521. El elemento afectado es la función UploadFirmwareFile del archivo /cgi-bin/cstecgi.cgi del componente Interfaz de Gestión Web. Esta manipulación del argumento FileName causa inyección de comandos del sistema operativo. El ataque puede llevarse a cabo de forma remota. El exploit ha sido divulgado públicamente y puede utilizarse."
    }
  ],
  "lastModified": "2026-07-23T11:10:00.120",
  "sourceIdentifier": "cna@vuldb.com"
}