FKIE_CVE-2018-9149

Vulnerability from fkie_nvd - Published: 2018-04-01 18:29 - Updated: 2026-06-17 02:06
Severity
6.8 (Medium) - CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
The Zyxel Multy X (AC3000 Tri-Band WiFi System) device doesn't use a suitable mechanism to protect the UART. After an attacker dismantles the device and uses a USB-to-UART cable to connect the device, he can use the 1234 password for the root account to login to the system. Furthermore, an attacker can start the device's TELNET service as a backdoor.
References
cve@mitre.orghttps://www.slideshare.net/secret/qrHwDOJ71eLg7fExploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.slideshare.net/secret/qrHwDOJ71eLg7fExploit, Third Party Advisory
Impacted products
Vendor Product Version
zyxel ac3000_firmware -
zyxel ac3000 -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:zyxel:ac3000_firmware:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "BD60F05E-3F39-48F8-8DD4-3EEE351AF4AE",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
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              "matchCriteriaId": "09CD4481-EA99-4565-8F60-96E79ADECA36",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Zyxel Multy X (AC3000 Tri-Band WiFi System) device doesn\u0027t use a suitable mechanism to protect the UART. After an attacker dismantles the device and uses a USB-to-UART cable to connect the device, he can use the 1234 password for the root account to login to the system. Furthermore, an attacker can start the device\u0027s TELNET service as a backdoor."
    },
    {
      "lang": "es",
      "value": "El dispositivo Zyxel Multy X (AC3000 Tri-Band WiFi System) no utiliza un mecanismo adecuado para proteger el UART. Despu\u00e9s de que un atacante inutilice el dispositivo y emplee un cable USB-UART para conectarse al dispositivo, puede utilizar la contrase\u00f1a 1234 para iniciar sesi\u00f3n en el sistema con la cuenta root. Adem\u00e1s, un atacante puede iniciar el servicio TELNET del dispositivo como una puerta trasera."
    }
  ],
  "id": "CVE-2018-9149",
  "lastModified": "2026-06-17T02:06:09.787",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 7.2,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "PHYSICAL",
          "availabilityImpact": "HIGH",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.0"
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        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2018-04-01T18:29:00.287",
  "references": [
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      "source": "cve@mitre.org",
      "tags": [
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      "url": "https://www.slideshare.net/secret/qrHwDOJ71eLg7f"
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  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-798"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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