CVE-2026-45255

Estado: AnalizadaAlta (7.5)—

When bsdinstall or bsdconfig are prompted to scan for nearby Wi-Fi networks, they build up a list of network names and use bsddialog(1) to prompt the user to select a network. This is implemented using a shell script, and the code which handled network names was not careful to prevent expansion by the shell. As a result, a suitably crafted network name can be used to execute commands via a subshell.

The problem can be exploited to execute code as root on the system running bsdinstall or bsdconfig.

Leer descripción completaMostrar menos

The attacker would need to create an access point with a specially crafted name and be within range of a Wi-Fi scan. Note that bsdinstall and bsdconfig are vulnerable as soon as the user prompts them to scan for nearby networks; they do not need to actually select the malicious network.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.34%
Percentil entre todas las CVEs puntuadas: 26
Fecha de la puntuación: 5/10/2026

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.

ExplotaciónT1210 Exploitation of Remote Serviceslateral movement75 %
Impacto principalT1059 Command and Scripting Interpreterexecution85 %
Impacto secundarioT1068 Exploitation for Privilege Escalationprivilege escalation80 %

AV:A (red adyacente) → T1210. Ejecución shell en subshell con nombres de red manipulados (CWE-78). Impacto: comandos como root.

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

Threat Intelligence Program Privileged Account Management Execution Prevention Disable or Remove Feature or Program Application Isolation and Sandboxing Exploit Protection

Tecnologías afectadas (1)

Freebsd — Freebsd

CWE

CWE-78

Referencias

https://security.freebsd.org/advisories/FreeBSD-SA-26:23.bsdinstall.asc

JSON original (NVD)

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      "value": "When bsdinstall or bsdconfig are prompted to scan for nearby Wi-Fi networks, they build up a list of network names and use bsddialog(1) to prompt the user to select a network.  This is implemented using a shell script, and the code which handled network names was not careful to prevent expansion by the shell.  As a result, a suitably crafted network name can be used to execute commands via a subshell.\n\nThe problem can be exploited to execute code as root on the system running bsdinstall or bsdconfig.  The attacker would need to create an access point with a specially crafted name and be within range of a Wi-Fi scan.  Note that bsdinstall and bsdconfig are vulnerable as soon as the user prompts them to scan for nearby networks; they do not need to actually select the malicious network."
    },
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      "lang": "es",
      "value": "Cuando se solicita a bsdinstall o bsdconfig que escaneen redes Wi-Fi cercanas, construyen una lista de nombres de red y usan bsddialog(1) para solicitar al usuario que seleccione una red. Esto se implementa usando un script de shell, y el código que manejaba los nombres de red no tuvo cuidado de evitar la expansión por parte del shell. Como resultado, un nombre de red adecuadamente elaborado puede usarse para ejecutar comandos a través de un subshell.\n\nEl problema puede ser explotado para ejecutar código como root en el sistema que ejecuta bsdinstall o bsdconfig. El atacante necesitaría crear un punto de acceso con un nombre especialmente elaborado y estar dentro del alcance de un escaneo Wi-Fi. Tenga en cuenta que bsdinstall y bsdconfig son vulnerables tan pronto como el usuario les solicita que escaneen redes cercanas; no necesitan seleccionar realmente la red maliciosa."
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