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

#fortinet #multipleproducts #cybersecurity #vulnerability

CVE ID

CVE-2025-59718

Vulnerability Name

Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability

Project: Fortinet
Product: Multiple Products

Date

Date Added: 2025-12-16
Due Date: 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.

Known To Be Used in Ransomware Campaigns?

Unknown

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.