MSRXCVE-2025-59718
CVE-2025-59718
Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CVSS 3.1 · CNA · fortinet.com
chance of exploitation in the next 30 days (EPSS; in the top 1% of all CVEs)
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.
Scores
Affected products
- fortinet 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
- fortinet fortiswitchmanager: ≥ 7.0.0, < 7.0.6; ≥ 7.2.0, < 7.2.7
- fortinet fortios: ≥ 7.0.0, < 7.0.18; ≥ 7.2.0, < 7.2.12; ≥ 7.4.0, < 7.4.9; ≥ 7.6.0, < 7.6.4
- siemens ruggedcom ape1808 firmware: all versions
Weakness: CWE-347
4 references (advisories, patches, write-ups)
- https://fortiguard.fortinet.com/psirt/FG-IR-25-647 · Vendor Advisory
- https://arcticwolf.com/resources/blog/arctic-wolf-observes-malicious-sso-logins-following-disclosure-cve-2025-59718-cve-2025-59719/ · Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-864900.html · Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59718 · US Government Resource
Sources: NVD, CVE.org, FIRST EPSS. Missing ones did not answer or have no record yet.