# CVE-2025-59718: Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability

> CVE-2025-59718: Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability. CVSS 9.1 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2025-59718
Last updated: 2026-10-15T01:09:26Z

- Published: 2025-12-09 17:20 UTC · Updated: 2026-10-15 01:09 UTC · Assigner: fortinet
- CVSS: 9.1 (CVSS 3.1) · Severity: Critical · Vector: 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
- EPSS: 68.3%, 99th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2025-12-16, federal due date 2025-12-23, ransomware use: Unknown
- CWE: CWE-347

## 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.

## CISA required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

## Affected vendors and products

- Fortinet: FortiOS
- Fortinet: FortiProxy
- Fortinet: FortiSwitchManager
- Siemens: RUGGEDCOM APE1808

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-59718)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-59718)
- [https://fortiguard.fortinet.com/psirt/FG-IR-25-647](https://fortiguard.fortinet.com/psirt/FG-IR-25-647)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-59718 · Markdown: https://rewindex.com/cve/CVE-2025-59718.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-59718 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:04.259Z