{"identifier":"CVE-2025-59718","cve":{"id":"CVE-2025-59718","description":"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.","published":"2025-12-09T18:15:54.983000+00:00","modified":"2026-06-17T09:46:35.807000+00:00","status":"Analyzed","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_version":"3.1","affected":[{"criteria":"cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0.0","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":"7.0.22"},{"criteria":"cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*","versionStartIncluding":"7.2.0","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":"7.2.15"},{"criteria":"cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*","versionStartIncluding":"7.4.0","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":"7.4.11"},{"criteria":"cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*","versionStartIncluding":"7.6.0","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":"7.6.4"},{"criteria":"cpe:2.3:a:fortinet:fortiswitchmanager:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0.0","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":"7.0.6"},{"criteria":"cpe:2.3:a:fortinet:fortiswitchmanager:*:*:*:*:*:*:*:*","versionStartIncluding":"7.2.0","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":"7.2.7"},{"criteria":"cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0.0","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":"7.0.18"},{"criteria":"cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*","versionStartIncluding":"7.2.0","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":"7.2.12"},{"criteria":"cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*","versionStartIncluding":"7.4.0","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":"7.4.9"},{"criteria":"cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*","versionStartIncluding":"7.6.0","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":"7.6.4"},{"criteria":"cpe:2.3:o:siemens:ruggedcom_ape1808_firmware:-:*:*:*:*:*:*:*","versionStartIncluding":"","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":""}],"weaknesses":["CWE-347"],"references":[{"url":"https://fortiguard.fortinet.com/psirt/FG-IR-25-647","source":"psirt@fortinet.com","tags":["Vendor Advisory"]},{"url":"https://arcticwolf.com/resources/blog/arctic-wolf-observes-malicious-sso-logins-following-disclosure-cve-2025-59718-cve-2025-59719/","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Third Party Advisory"]},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-864900.html","source":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","tags":["Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59718","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["US Government Resource"]}],"kev":{"cveID":"CVE-2025-59718","vendorProject":"Fortinet","product":"Multiple Products","vulnerabilityName":"Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability","dateAdded":"2025-12-16","shortDescription":"Fortinet FortiOS, FortiSwitchMaster, FortiProxy, and FortiWeb contain an improper verification of cryptographic signature vulnerability that may allow an unauthenticated attacker to bypass the FortiCloud SSO login authentication via a crafted SAML message. 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Ensure to apply all patches mentioned in the advisory.","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","dueDate":"2025-12-23","knownRansomwareCampaignUse":"Unknown","forensicTriage":"No","notes":"https://fortiguard.fortinet.com/psirt/FG-IR-25-647 ; https://docs.fortinet.com/upgrade-tool/fortigate ; 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