Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 16/12/2025. Patch affected systems as an emergency.
| Package | Affected versions | Patched versions |
|---|---|---|
| fortiproxy | ≥ 7.0.0, < 7.0.22≥ 7.2.0, < 7.2.15≥ 7.4.0, < 7.4.11≥ 7.6.0, < 7.6.4 | 7.0.227.2.157.4.117.6.4 |
| fortiswitchmanager | ≥ 7.0.0, < 7.0.6≥ 7.2.0, < 7.2.7 | 7.0.67.2.7 |
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.
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