CRITICALCVSS 9.8Actively exploited · CISA KEV since 2025-12-16Vulnerability
CVE-2025-59718
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.
Properties
- Euvd product
- FortiOS, FortiProxy, FortiSwitchManager
- Vulnerability name
- Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability
- First seen
- 2026-10-15T01:09:26+00:00
- Cvss score
- 9.8
- Epss score
- 0.68293
- Last seen
- 2026-10-19T12:00:27+00:00
- Due date
- 2025-12-23
- Euvd assigner
- fortinet
- Retrieved at
- 2026-10-21T01:24:48+00:00
- Exploited euvd since
- 2025-12-16T00:00:00+00:00
- Src batch id
- epss_history-20261020T103617Z-728ddd
- Source url
- https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
- Date added
- 2025-12-16
- Score
- 9.8
- Euvd base score version
- 3.1
- Fetched at
- 2026-10-20T10:36:20+00:00
- Euvd vendor
- Fortinet
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- In Signal since
- initial import (Sep 2026)
- Euvd base score
- 9.1
Related Entities (13)
AFFECTS_PRODUCT (5)
MENTIONED_IN (5)
DESCRIBES (1)
HAS_WEAKNESS (1)
INVOLVES (1)
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