CVE-2025-59718
CVSS Score
9.1
EPSS Score
2.0%
EPSS Percentile
83th
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.
| CWE | CWE-347 |
| Vendor | fortinet |
| Product | fortiswitchmanager |
| Ecosystems | |
| Industries | NetworkingSecurity |
| Published | Dec 9, 2025 |
| Last Updated | Mar 20, 2026 |
⚠️ Actively Exploited — Act Now
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Fortinet / FortiSwitchManager
7.2.0 ≤ 7.2.6 7.0.0 ≤ 7.0.5
Fortinet / FortiOS
7.6.0 ≤ 7.6.3 7.4.0 ≤ 7.4.8 7.2.0 ≤ 7.2.11 7.0.0 ≤ 7.0.17
Fortinet / FortiProxy
7.6.0 ≤ 7.6.3 7.4.0 ≤ 7.4.10 7.2.0 ≤ 7.2.14 7.0.0 ≤ 7.0.21
References
fortiguard.fortinet.com: https://fortiguard.fortinet.com/psirt/FG-IR-25-647 arcticwolf.com: https://arcticwolf.com/resources/blog/arctic-wolf-observes-malicious-sso-logins-following-disclosure-cve-2025-59718-cve-2025-59719/ cisa.gov: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59718