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Vulnerability record · CVE-2025-53379 · published 14 July 2026

CVE-2025-53379: Fortinet fortiauthenticator out-of-bounds read vulnerability

Fortinet · Fortiauthenticator

A out-of-bounds read vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.2, FortiAuthenticator 6.5 all versions may allow a remote unauthenticated attacker to retrieve sensitive information via a specially crafted request.

7.5 CVSS 3.1 High EPSS 0.53% · top 57.6% CWE-125 · Out-of-bounds read
7.5CVSS 3.1 base score
0.53%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
15 Jul 2026Last modified by NVD

Description

A out-of-bounds read vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.2, FortiAuthenticator 6.5 all versions may allow a remote unauthenticated attacker to retrieve sensitive information via a specially crafted request.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://fortiguard.fortinet.com/psirt/FG-IR-26-146 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-44277Fortinet fortiauthenticator improper access control vulnerabilityA improper access control vulnerability in Fortinet FortiAuthenticator 8.0.2, FortiAuthenticator 8.0.0, FortiAuthenticator 6.6.0 through 6.6.8, Forti…EPSS 0.48%9.0CVE-2013-6990Fortinet fortiauthenticator permissions and access controls vulnerabilityFortiGuard FortiAuthenticator before 3.0 allows remote administrators to gain privileges via the command line interface.EPSS 1.1%8.8CVE-2021-26116Fortinet fortiauthenticator os command injection vulnerabilityAn improper neutralization of special elements used in an OS command vulnerability in the command line interpreter of FortiAuthenticator before 6.3.1…EPSS 0.62%8.1CVE-2021-43068Fortinet fortiauthenticator improper authentication vulnerabilityA improper authentication in Fortinet FortiAuthenticator version 6.4.0 allows user to bypass the second factor of authentication via a RADIUS login p…EPSS 0.57%7.5CVE-2021-22124Fortinet fortiauthenticator uncontrolled resource consumption vulnerabilityAn uncontrolled resource consumption (denial of service) vulnerability in the login modules of FortiSandbox 3.2.0 through 3.2.2, 3.1.0 through 3.1.4,…EPSS 1.0%7.5CVE-2021-24005Fortinet fortiauthenticator hard-coded credentials vulnerabilityUsage of hard-coded cryptographic keys to encrypt configuration files and debug logs in FortiAuthenticator versions before 6.3.0 may allow an attacke…EPSS 0.56%7.5CVE-2015-1455Fortinet fortiauthenticator vulnerabilityFortinet FortiAuthenticator 3.0.0 has a password of (1) slony for the slony PostgreSQL user and (2) www-data for the www-data PostgreSQL user, which …EPSS 2.7%7.2CVE-2026-21743Fortinet fortiauthenticator missing authorization vulnerabilityA missing authorization vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all versions, FortiAuthenticator 6.4…EPSS 0.35%

Source: NIST National Vulnerability Database (record CVE-2025-53379), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.