CVE-2026-23759

Estado: AplazadaAlta (8.6)—

Perle IOLAN STS/SCS terminal server models with firmware versions prior to 6.0 allow authenticated OS command injection via the restricted shell accessed over Telnet or SSH. The shell 'ps' command does not perform proper argument sanitization and passes user-supplied parameters into an 'sh -c' invocation running as root. An authenticated attacker who can log in to the device can inject shell metacharacters after the 'ps' subcommand to execute arbitrary OS commands with root privileges, leading to full compromise of the underlying operating system.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Puntuación base: 8.6

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 1.51%
Percentil entre todas las CVEs puntuadas: 74
Fecha de la puntuación: 6/10/2026

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 movement90 %
Impacto principalT1059 Command and Scripting Interpreterexecution95 %
Impacto secundarioT1068 Exploitation for Privilege Escalationprivilege escalation85 %

AV:N con PR:H indica servicio remoto accesible con privilegios previos (Telnet/SSH autenticado); CWE-78 (command injection) y ejecución como root confirman T1059 e impacto de escalada.

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 (2)

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

Perle — Iolan SCS^AI Perle — Iolan STS^AI

CWE

CWE-78

Referencias

JSON original (NVD)

Mostrar

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  "id": "CVE-2026-23759",
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          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
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            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
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          "version": "2.0.3",
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  "published": "2026-03-17T16:16:20.127",
  "references": [
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      "url": "https://www.perle.com/downloads/server_sds_sts_rackmount.shtml",
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    {
      "url": "https://www.perle.com/support_services/documentation_pdfs/iolan_scs-sds-sts_ug.pdf",
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      "url": "https://www.vulncheck.com/advisories/perle-iolan-sts-scs-authenticated-command-injection-via-shell-ps",
      "source": "disclosure@vulncheck.com"
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      "description": [
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      "lang": "en",
      "value": "Perle IOLAN STS/SCS terminal server models with firmware versions prior to 6.0 allow authenticated OS command injection via the restricted shell accessed over Telnet or SSH. The shell 'ps' command does not perform proper argument sanitization and passes user-supplied parameters into an 'sh -c' invocation running as root. An authenticated attacker who can log in to the device can inject shell metacharacters after the 'ps' subcommand to execute arbitrary OS commands with root privileges, leading to full compromise of the underlying operating system."
    },
    {
      "lang": "es",
      "value": "Modelos de servidor terminal Perle IOLAN STS/SCS con versiones de firmware anteriores a la 6.0 permiten la inyección de comandos del sistema operativo autenticada a través de la shell restringida a la que se accede por Telnet o SSH. El comando 'ps' de la shell no realiza una sanitización adecuada de los argumentos y pasa parámetros proporcionados por el usuario a una invocación de 'sh -c' que se ejecuta como root. Un atacante autenticado que puede iniciar sesión en el dispositivo puede inyectar metacaracteres de shell después del subcomando 'ps' para ejecutar comandos arbitrarios del sistema operativo con privilegios de root, lo que lleva a un compromiso total del sistema operativo subyacente."
    }
  ],
  "lastModified": "2026-06-17T10:22:03.937",
  "sourceIdentifier": "disclosure@vulncheck.com"
}