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CVE-2021-35973

Estado: ModificadaCrítica (9.8)—

NETGEAR WAC104 devices before 1.0.4.15 are affected by an authentication bypass vulnerability in /usr/sbin/mini_httpd, allowing an unauthenticated attacker to invoke any action by adding the &currentsetting.htm substring to the HTTP query, a related issue to CVE-2020-27866. This directly allows the attacker to change the web UI password, and eventually to enable debug mode (telnetd) and gain a shell on the device as the admin limited-user account (however, escalation to root is simple because of weak permissions on the /etc/ directory).

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)

Netgear — Wac104 Firmware

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-35973",
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
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        "acInsufInfo": false,
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        "obtainUserPrivilege": false,
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        "userInteractionRequired": false
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  "published": "2021-06-30T15:15:10.607",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "value": "CWE-697"
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  "descriptions": [
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      "lang": "en",
      "value": "NETGEAR WAC104 devices before 1.0.4.15 are affected by an authentication bypass vulnerability in /usr/sbin/mini_httpd, allowing an unauthenticated attacker to invoke any action by adding the &currentsetting.htm substring to the HTTP query, a related issue to CVE-2020-27866. This directly allows the attacker to change the web UI password, and eventually to enable debug mode (telnetd) and gain a shell on the device as the admin limited-user account (however, escalation to root is simple because of weak permissions on the /etc/ directory)."
    },
    {
      "lang": "es",
      "value": "Los dispositivos NETGEAR WAC104 versiones anteriores a 1.0.4.15 están afectados por una vulnerabilidad de omisión de autenticación en /usr/sbin/mini_httpd, que permite a un atacante no autenticado invocar cualquier acción añadiendo la subcadena &currentsetting.htm a la consulta HTTP, un problema relacionado con CVE-2020-27866. Esto permite directamente al atacante cambiar la contraseña de la interfaz web, y eventualmente habilitar el modo de depuración (telnetd) y obtener un shell en el dispositivo como la cuenta de usuario limitado admin (sin embargo, la escalada a root es sencilla debido a los permisos débiles en el directorio /etc/)"
    }
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  "lastModified": "2026-06-17T03:58:07.907",
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