CVE-2025-53379

HIGH
Published Jul 14, 2026 Modified Jul 15, 2026 CWE-125

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.

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CVSS v3.1 Score

7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploit Prediction

0.0039
Probability of exploitation
0.31%
Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

Affected Products

Vendor Product
fortinet fortiauthenticator
fortinet fortiauthenticator

References

Frequently Asked Questions

What is CVE-2025-53379? +
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. It has a CVSS v3.1 base score of 7.5 (HIGH).
How severe is CVE-2025-53379? +
CVE-2025-53379 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0039, placing it in the 0th percentile for exploitation probability.
What products are affected by CVE-2025-53379? +
CVE-2025-53379 affects products from fortinet, specifically: fortiauthenticator. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2025-53379? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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