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CVE-2025-52376

Estado: AplazadaCrítica (9.8)—

An authentication bypass vulnerability in the /web/um_open_telnet.cgi endpoint in Nexxt Solutions NCM-X1800 Mesh Router firmware UV1.2.7 and below, allowing an attacker to remotely enable the Telnet service without authentication, bypassing security controls. The Telnet server is then accessible with hard-coded credentials, allowing attackers to gain administrative shell access and execute arbitrary commands on the device.

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.

Acceso remoto de red sin autenticación (AV:N, PR:N, UI:N) contra endpoint web expuesto. Impacto: credenciales hardcodeadas de Telnet y ejecución de comandos arbitrarios como administrador.

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 ContentPassword PoliciesNetwork SegmentationMulti-factor Authentication

Tecnologías afectadas (1)

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

Nexxtsolutions — Ncm-x1800AI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2025-52376",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-52376",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-07-15T14:22:38.901144Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
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  "affected": [
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      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
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  "published": "2025-07-15T14:15:30.540",
  "references": [
    {
      "url": "https://github.com/Vagebondcur/nexxt-solutions-NCM-X1800-exploits",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/Vagebondcur/nexxt-solutions-NCM-X1800-exploits/blob/main/CVE-2025-52376/writeup.md",
      "source": "cve@mitre.org"
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  "vulnStatus": "Deferred",
  "weaknesses": [
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      "description": [
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    {
      "lang": "en",
      "value": "An authentication bypass vulnerability in the /web/um_open_telnet.cgi endpoint in Nexxt Solutions NCM-X1800 Mesh Router firmware UV1.2.7 and below, allowing an attacker to remotely enable the Telnet service without authentication, bypassing security controls. The Telnet server is then accessible with hard-coded credentials, allowing attackers to gain administrative shell access and execute arbitrary commands on the device."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de omisión de autenticación en el endpoint /web/um_open_telnet.cgi del router de malla Nexxt Solutions NCM-X1800 con firmware UV1.2.7 y anteriores permite a un atacante habilitar remotamente el servicio Telnet sin autenticación, evadiendo así los controles de seguridad. El servidor Telnet es entonces accesible con credenciales predefinidas, lo que permite a los atacantes obtener acceso administrativo al shell y ejecutar comandos arbitrarios en el dispositivo."
    }
  ],
  "lastModified": "2026-06-17T09:36:26.627",
  "sourceIdentifier": "cve@mitre.org"
}