onyx --cves cve-2025-59718
CVE-2025-59718
- score
- 0.1
- cvss
- 9.8
- epss
- 68.3%
- published
- 2025-12-09
- kev added
- 2025-12-16
- first seen
Fortinet FortiOS 7.0.0 through 7.6.3, FortiProxy 7.0.0 through 7.6.3, and FortiSwitchManager 7.0.0 through 7.2.6 contain an authentication bypass caused by improper verification of cryptographic signatures in SAML response messages, letting unauthenticated attackers bypass FortiCloud SSO login via crafted SAML responses.
Timeline
How this CVE moved toward exploitation. Chart: last 30 days — trend score, EPSS, community mentions per day; hover the event lane.
- Published
- Added to CISA KEV
- Tracked by Onyx
- Public PoC
Exploit availability
Public PoC flagged by vulnx; no direct exploit link among the citations.
Weaknesses
References 14
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59718
- https://cert-portal.siemens.com/productcert/html/ssa-864900.html
- https://www.levelblue.com/blogs/spiderlabs-blog/ttp-briefing-q2-2026
- https://www.trendmicro.com/vinfo/gb/security/news/cybercrime-and-digital-threats/edge-under-siege-how-state-sponsored-actors-exploit-your-perimeter
- https://www.rapid7.com/blog/post/ve-fortigate-cve-2025-59718-exploitation-incident-response-ir-findings/
- https://blackpointcyber.com/wp-content/uploads/2026/04/2026-Annual-Threat-Report-Blackpoint-Cyber.pdf
- https://www.sentinelone.com/blog/fortigate-edge-intrusions/
- https://arcticwolf.com/resources/blog/arctic-wolf-observes-malicious-configuration-changes-fortinet-fortigate-devices-via-sso-accounts/
- https://www.loginsoft.com/reports/annually/vulnerability-intelligence-report-2025
- https://fortiguard.fortinet.com/psirt/FG-IR-25-647
- https://blog.qualys.com/vulnerabilities-threat-research/2026/07/08/fortibleed-fortigate-credential-reuse-internet-exposed
- https://ctrlaltintel.com/research/Qilin/
- https://www.cert.at/en/blog/2026/1/threat-actors-use-forticloud-to-collect-ldap-connection-passwords
- https://arcticwolf.com/resources/blog/arctic-wolf-observes-malicious-sso-logins-following-disclosure-cve-2025-59718-cve-2025-59719/