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CVE-2025-59718

Published: Dec 9, 2025Updated: Jun 9, 2026 Sources: CVE List NVD BDU csafCWE-347
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
63.5%
Top 0.9%
CISA KEV
Active Exploitation
Since Dec 16, 2025
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-347

Affected Products

FortiWebFortinet Inc.Security Products
FortiOSFortinet Inc.Security Products
FortiProxyFortinet Inc.Security Products
FortiSwitchManagerFortinet Inc.Security Products
FortiSwitchManagerFortinetSecurity Products
fortinet inc.commercialUSNetworking Infrastructureaka fortinet
fortinetcommercialUSSecurity Productsaka forti net
and 6 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Dec 16, 2025
Remediation due:Dec 23, 2025

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.

Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://fortiguard.fortinet.com/psirt/FG-IR-25-647
fortiguard.fortinet.com
https://www.cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv
cisa.gov
https://cert-portal.siemens.com/productcert/csaf/ssa-864900.json
cert-portal.siemens.com
and 68 more references View all →

Timeline

Published
Dec 9, 2025
Added to CISA KEV
Dec 16, 2025
Last Updated
Jun 9, 2026
News mentions
2

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