CVE-2026-24858
Estado: AnalizadaCrítica (9.8)⚠ Explotación activa
An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiNAC-F 7.6.3 through 7.6.5, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4.0 through 7.4.12, FortiProxy 7.2.0 through 7.2.15, FortiProxy 7.0.0 through 7.0.22, FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 9.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 86%
- Percentil entre todas las CVEs puntuadas: 100
- 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).
CISA KEV — explotada activamente
- Añadida al catálogo: 27/1/2026
- Plazo de remediación: 30/1/2026
- Uso conocido en ransomware: Unknown
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access85 % - Impacto principal
T1078Valid Accountsstealth · persistence · privilege escalation · initial access90 % - Impacto secundario
T1098Account Manipulationpersistence · privilege escalation75 %
Bypass de autenticación AV:N sin privilegios mediante ruta alternativa (SSO FortiCloud). Permite acceso no autorizado a cuentas de otros usuarios en dispositivos remotos.
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
Tecnologías afectadas (7)
CWE
- CWE-288
Referencias
JSON original (NVD)
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"value": "Una vulnerabilidad de omisión de autenticación usando una ruta o canal alternativo [CWE-288] en Fortinet FortiAnalyzer 7.6.0 hasta 7.6.5, FortiAnalyzer 7.4.0 hasta 7.4.9, FortiAnalyzer 7.2.0 hasta 7.2.11, FortiAnalyzer 7.0.0 hasta 7.0.15, FortiManager 7.6.0 hasta 7.6.5, FortiManager 7.4.0 hasta 7.4.9, FortiManager 7.2.0 hasta 7.2.11, FortiManager 7.0.0 hasta 7.0.15, FortiOS 7.6.0 hasta 7.6.5, FortiOS 7.4.0 hasta 7.4.10, FortiOS 7.2.0 hasta 7.2.12, FortiOS 7.0.0 hasta 7.0.18, FortiProxy 7.6.0 hasta 7.6.4, FortiProxy 7.4.0 hasta 7.4.12, FortiProxy 7.2.0 hasta 7.2.15, FortiProxy 7.0.0 hasta 7.0.22, FortiWeb 8.0.0 hasta 8.0.3, FortiWeb 7.6.0 hasta 7.6.6, FortiWeb 7.4.0 hasta 7.4.11 puede permitir a un atacante con una cuenta de FortiCloud y un dispositivo registrado iniciar sesión en otros dispositivos registrados en otras cuentas, si la autenticación SSO de FortiCloud está habilitada en esos dispositivos."
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