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CVE-2025-59923: Improper access control in FortiAuthenticator
An improper access control vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all versions, FortiAuthenticator 6.4 all versions, FortiAuthenticator 6.3 all versions may allow an authenticated attacker with at least read-only admin permission to obtain the credentials of other administrators' messaging services via crafted requests.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| FortiAuthenticator 6.6.0 to 6.6.6 | 6.6.7 or later |
| FortiAuthenticator 6.5.0 to 6.5.6 | Upgrade past 6.5.6; see the advisory |
| FortiAuthenticator 6.4.0 to 6.4.10 | Upgrade past 6.4.10; see the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
An improper access control vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all versions, FortiAuthenticator 6.4 all versions, FortiAuthenticator 6.3 all versions may allow an authenticated attacker with at least read-only admin permission to obtain the credentials of other administrators' messaging services via crafted requests.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 10 Oct 2026.