Vulnerability Intelligence Report
Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability
CVE-2025-59718
A improper verification of cryptographic signature vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0.0 through 7.0.17, FortiProxy 7.6.0 through 7.6.3, FortiProxy 7.4.0 through 7.4.10, FortiProxy 7.2.0 through 7.2.14, FortiProxy 7.0.0 through 7.0.21, FortiSwitchManager 7.2.0 through 7.2.6, FortiSwitchManager 7.0.0 through 7.0.5 allows an unauthenticated attacker to bypass the FortiCloud SSO login authentication via a crafted SAML response message.
CISA KEV
SSVC: Active Exploitation
Automatable
CVSS Base Score
9.1
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:63.44%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-347 ↗Improper access control
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Fortinet | FortiSwitchManager | 7.2.0 <= 7.2.6 (affected), 7.0.0 <= 7.0.5 (affected) |
| Fortinet | FortiOS | 7.6.0 <= 7.6.3 (affected), 7.4.0 <= 7.4.8 (affected), 7.2.0 <= 7.2.11 (affected), 7.0.0 <= 7.0.17 (affected) |
| Fortinet | FortiProxy | 7.6.0 <= 7.6.3 (affected), 7.4.0 <= 7.4.10 (affected), 7.2.0 <= 7.2.14 (affected), 7.0.0 <= 7.0.21 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Fortinet, Inc. · Vendor · USA |
| Reserved | 2025-09-19T04:30:39 |
| Published | 2025-12-09T17:20:11 |
| Last Updated | 2026-08-11T12:23:14 |
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