High7.0Fortinet

High [CVE-2025-53379] Out of bounds read in GUI

This high-severity Fortinet advisory covers CVE-2025-53379 affecting FortiAuthenticator.

FG-IR-26-146 Published Jul 14, 2026Updated by vendor Jul 14, 2026

CVE-2025-53379

Affected products & platforms

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Summary

CVSSv3 Score:

7.0

An out of bounds read [CWE-125] vulnerability in FortiAuthenticator may allow a remote unauthenticated attacker to retrieve sensitive information via a specially crafted request.

Revised on 2026-07-14 00:00:00

Affected versions

FortiAuthenticator 6.6: 6.6.0 through 6.6.2
FortiAuthenticator 6.5: 6.5 all versions

Official advisory · high-confidence parse· fetched 9 days ago·verify at source

Fixed versions

FortiAuthenticator 6.6: 6.6.3
FortiAuthenticator 6.5: migrate to a fixed release

Official advisory · high-confidence parse· fetched 9 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Upgrade per the Affected/Solution table: FortiAuthenticator 6.6: 6.6.3; FortiAuthenticator 6.5: migrate to a fixed release.

Official advisory · high-confidence parse· fetched 9 days ago·verify at source

Sources

Official and corroborating records used to build this advisory.

FortiGuard PSIRT Advisoriesofficial
Official vendor source used to discover this advisory; it remains the authority for affected products and remediation. Discovered from the machine-readable feed https://filestore.fortinet.com/fortiguard/rss/ir.xml; this link opens the Fortinet advisory index instead of the raw feed document.
Fortinet
Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Fortinet
CVE.org CNA affected-product recordCVE.org
Structured CNA affected[] data independently confirmed the affected product scope; native advisory content remains authoritative.
CVE Program

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2025-53379NVD CVE.org MITRE

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