CVE-2025-59718

Known Exploited Vulnerability Entry External Catalog

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Entry Details

CVE-2025-59718

Confirmed

Yes

2025-12-16 00:00 UTC

Timestamps

2025-12-16

2025-12-16

Scope

KEV entry: Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability | Affected: Fortinet / Multiple Products | 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. | 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. | Due date: 2025-12-23 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://fortiguard.fortinet.com/psirt/FG-IR-25-647 ; https://docs.fortinet.com/upgrade-tool/fortigate ; https://nvd.nist.gov/vuln/detail/CVE-2025-59718

References
  • {'id': 'CVE-2025-59718', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-59718'}

18ff976e-3478-42e9-93f1-7aa3db51cef2

405284c2-e461-4670-8979-7fd2c9755a60

2026-02-02 13:24 UTC

2026-02-06 07:53 UTC

Evidence (1)
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [
    "CWE-347"
  ],
  "date_added": "2025-12-16",
  "due_date": "2025-12-23",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Unknown",
  "product": "Multiple Products",
  "vendorProject": "Fortinet",
  "vulnerabilityName": "Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability"
}
 -
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