FKIE_CVE-2021-20843

Vulnerability from fkie_nvd - Published: 2021-11-24 16:15 - Updated: 2026-06-17 03:34
Severity
5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Summary
Cross-site script inclusion vulnerability in the Web GUI of RTX830 Rev.15.02.17 and earlier, NVR510 Rev.15.01.18 and earlier, NVR700W Rev.15.00.19 and earlier, and RTX1210 Rev.14.01.38 and earlier allows a remote authenticated attacker to alter the settings of the product via a specially crafted web page.
References
vultures@jpcert.or.jphttp://www.rtpro.yamaha.co.jp/RT/FAQ/Security/JVNVU91161784.htmlMitigation, Vendor Advisory
vultures@jpcert.or.jphttps://business.ntt-east.co.jp/topics/2021/11_09.htmlMitigation, Vendor Advisory
vultures@jpcert.or.jphttps://jvn.jp/en/vu/JVNVU91161784/index.htmlMitigation, Third Party Advisory
vultures@jpcert.or.jphttps://www.ntt-west.co.jp/smb/kiki_info/info/211109.htmlMitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.rtpro.yamaha.co.jp/RT/FAQ/Security/JVNVU91161784.htmlMitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://business.ntt-east.co.jp/topics/2021/11_09.htmlMitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://jvn.jp/en/vu/JVNVU91161784/index.htmlMitigation, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.ntt-west.co.jp/smb/kiki_info/info/211109.htmlMitigation, Vendor Advisory
Impacted products
Vendor Product Version
yamaha rtx830_firmware *
yamaha rtx830 -
yamaha nvr510_firmware *
yamaha nvr510 -
yamaha nvr700w_firmware *
yamaha nvr700w -
yamaha rtx1210_firmware *
yamaha rtx1210 -
ntt-west biz_box_rtx830_firmware *
ntt-west biz_box_rtx830 -
ntt-west biz_box_nvr510_firmware *
ntt-west biz_box_nvr510 -
ntt-west biz_box_nvr700w_firmware *
ntt-west biz_box_nvr700w -
ntt-west biz_box_rtx1210_firmware *
ntt-west biz_box_rtx1210 -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "RTX830, NVR510, NVR700W, RTX1210",
          "vendor": "Yamaha Corporation",
          "versions": [
            {
              "status": "affected",
              "version": "RTX830 Rev.15.02.17 and earlier, NVR510 Rev.15.01.18 and earlier, NVR700W Rev.15.00.19 and earlier, RTX1210 Rev.14.01.38 and earlier"
            }
          ]
        }
      ],
      "source": "vultures@jpcert.or.jp"
    }
  ],
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Cross-site script inclusion vulnerability in the Web GUI of RTX830 Rev.15.02.17 and earlier, NVR510 Rev.15.01.18 and earlier, NVR700W Rev.15.00.19 and earlier, and RTX1210 Rev.14.01.38 and earlier allows a remote authenticated attacker to alter the settings of the product via a specially crafted web page."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de inclusi\u00f3n de scripts en la interfaz gr\u00e1fica de usuario de RTX830 Rev.15.02.17 y anteriores, NVR510 Rev.15.01.18 y anteriores, NVR700W Rev.15.00.19 y anteriores, y RTX1210 Rev.14.01.38 y anteriores, permite a un atacante remoto autenticado alterar la configuraci\u00f3n del producto por medio de una p\u00e1gina web especialmente dise\u00f1ada"
    }
  ],
  "id": "CVE-2021-20843",
  "lastModified": "2026-06-17T03:34:31.730",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "NONE",
          "baseScore": 3.5,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 6.8,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 2.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-11-24T16:15:13.230",
  "references": [
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      "tags": [
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  "sourceIdentifier": "vultures@jpcert.or.jp",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-829"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.



Related by attack behaviour

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.