CVE-2025-59718

CRITICAL CISA KEV

CVSS v3

9.8

CRITICAL

EPSS Score

2.0%

exploit probability

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

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 craf

CISA Known Exploited Vulnerability

Date Added: 12/16/2025
Patch Due Date: 12/23/2025
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.

Technical Details

CVSS v3 Vector: 3.1
Published: 12/9/2025
Last Modified: 12/17/2025

Frequently Asked Questions

What is CVE-2025-59718?

Is CVE-2025-59718 actively exploited?

Yes. CVE-2025-59718 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 12/23/2025.

What is the CVSS score for CVE-2025-59718?

CVE-2025-59718 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string 3.1.

Is CVE-2025-59718 affecting your environment?

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