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CVE-2021-26827

Estado: ModificadaAlta (7.5)—

Un desbordamiento de búfer en el firmware TP-Link WR2041 v1 para el enrutador TL-WR2041+, permite a atacantes remotos causar una denegación de servicio (DoS) mediante el envío de una petición HTTP con un parámetro "ssid" muy largo al "/userRpm/popupSiteSurveyRpm.html ", que bloquea el enrutador

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).

Tecnologías afectadas (1)

Tp-link — Tl-wr2041+ Firmware

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-26827",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-04-14T14:15:13.460",
  "references": [
    {
      "url": "https://github.com/GD008/vuln/blob/main/tplink_wr2041/tplink_WR2041pv1.md",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/GD008/vuln/blob/main/tplink_wr2041/tplink_WR2041pv1.md",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Buffer Overflow in TP-Link WR2041 v1 firmware for the TL-WR2041+ router allows remote attackers to cause a Denial-of-Service (DoS) by sending an HTTP request with a very long \"ssid\" parameter to the \"/userRpm/popupSiteSurveyRpm.html\" webpage, which crashes the router."
    },
    {
      "lang": "es",
      "value": "Un desbordamiento de búfer en el firmware TP-Link WR2041 v1 para el enrutador TL-WR2041+, permite a atacantes remotos causar una denegación de servicio (DoS) mediante el envío de una petición HTTP con un parámetro \"ssid\" muy largo al \"/userRpm/popupSiteSurveyRpm.html \", que bloquea el enrutador"
    }
  ],
  "lastModified": "2026-06-17T03:43:49.753",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:tp-link:tl-wr2041\\+_firmware:-:*:*:*:*:*:*:*",
              "vulnerable": true,
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          "operator": "OR"
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          "cpeMatch": [
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      "operator": "AND"
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  "sourceIdentifier": "cve@mitre.org"
}