All vulnerabilities
CVE-2025-59718

Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability

Fortinet Multiple ProductsNetwork & edge
Open in ThreatlineRecord JSON
CVSS
9.1Critical
ExploitationExploited in the wildAdded to KEV 16 Dec 2025CISA KEV
Exploit odds (EPSS)68.3%Chance of exploitation activity in the next 30 days, higher than 99% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline23 Dec 2025Remediation due date for US federal agenciesCISA KEV
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 9 Dec 2025, 17:20 UTCPublishedCVE List
  2. 16 Dec 2025Added to CISA KEVCISA KEV

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.

Text from CVE List

Affected versions 10

  • FortiSwitchManageraffected: 7.2.0 through 7.2.6CVE List
  • FortiSwitchManageraffected: 7.0.0 through 7.0.5CVE List
  • FortiOSaffected: 7.6.0 through 7.6.3CVE List
  • FortiOSaffected: 7.4.0 through 7.4.8CVE List
  • FortiOSaffected: 7.2.0 through 7.2.11CVE List
  • FortiOSaffected: 7.0.0 through 7.0.17CVE List
  • FortiProxyaffected: 7.6.0 through 7.6.3CVE List
  • FortiProxyaffected: 7.4.0 through 7.4.10CVE List
  • FortiProxyaffected: 7.2.0 through 7.2.14CVE List
  • FortiProxyaffected: 7.0.0 through 7.0.21CVE List

References 6