CVE detail

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

Published 2025-12-16 · Modified 2025-12-16 · Source kev

HIGH

severity

CVSS-derived band

n/a

CVSS v3

0–10 scale

0.6344

EPSS probability

exploitation probability, 30d

99.0%

EPSS percentile

percentile vs all CVEs

LISTED

CISA KEV

due 2025-12-23

Description

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. Please be aware that CVE-2025-59719 pertains to the same problem and is mentioned in the same vendor advisory. Ensure to apply all patches mentioned in the advisory.

Remediation

No vendor-published fix data in our corpus for this CVE. Check the references below or the vendor's PSIRT / security advisories page.

References

cvedb.io · NVD · CISA KEV · FIRST EPSS · vendor advisories (CVE Program List v5). Informational only, no warranty — verify every remediation against the vendor advisory before acting on it. This product uses data from the NVD API but is not endorsed or certified by the NVD, CISA, FIRST.org or any vendor named. CVE® is a registered trademark of The MITRE Corporation.