Missing authorization in FortiFone - CVE-2025-47855

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Main Vulnerability Database Vulnerabilities #VU121349

Missing authorization in FortiFone - CVE-2025-47855

Published: January 14, 2026


Vulnerability identifier: #VU121349
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2025-47855
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Fortinet, Inc
Affected software:
FortiFone

Detailed vulnerability description

The vulnerability allows a remote attacker to compromise the affected device.

The vulnerability exists due to missing authorization checks in FortiFone Web Portal page. A remote non-authenticated attacker can obtain the device configuration via a specially crafted HTTP request and compromise the affected device. 


How to mitigate CVE-2025-47855

Install updates from vendor's website.

Sources