CVE-2025-20350
Estado: AnalizadaAlta (7.5)—
A vulnerability in the web UI of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 running Cisco SIP Software could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device.
This vulnerability is due to a buffer overflow when an affected device processes HTTP packets. An attacker could exploit this vulnerability by sending crafted HTTP input to the device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Note: To exploit this vulnerability, the phone must be registered to Cisco Unified Communications Manager and have Web Access enabled. Web Access is disabled by default.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.48%
- Percentil entre todas las CVEs puntuadas: 39
- 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.
- Explotación
T1190Exploit Public-Facing Applicationinitial access95 % - Impacto principal
T1499.004Application or System Exploitationimpact90 %
Vulnerabilidad en aplicación web remota (CWE-121: buffer overflow en procesamiento HTTP) sin autenticación ni interacción del usuario, vector AV:N/PR:N/UI:N. DoS por recarga del dispositivo.
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 (17)
Cisco — Desk Phone 9841 FirmwareCisco — Desk Phone 9851 FirmwareCisco — Desk Phone 9861 FirmwareCisco — Desk Phone 9871 FirmwareCisco — IP Phone 7811 FirmwareCisco — IP Phone 7821 FirmwareCisco — IP Phone 7841 FirmwareCisco — IP Phone 7861 FirmwareCisco — IP Phone 8811 FirmwareCisco — IP Phone 8821 FirmwareCisco — IP Phone 8832 FirmwareCisco — IP Phone 8841 FirmwareCisco — IP Phone 8845 FirmwareCisco — IP Phone 8851 FirmwareCisco — IP Phone 8861 FirmwareCisco — IP Phone 8865 FirmwareCisco — Video Phone 8875 Firmware
CWE
- CWE-121
Referencias
JSON original (NVD)
Mostrar
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