CVE-2025-59718

Published Dec 9, 2025 CVSS 3.1 · 9.1 Critical EPSS 68.1% KEV · Listed

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Fortinet

FortiSwitchManager

unaffected

Version	Status	Constraints
`7.2.0`	affected	≤ 7.2.6
`7.0.0`	affected	≤ 7.0.5

Fortinet

FortiOS

unaffected

Version	Status	Constraints
`7.6.0`	affected	≤ 7.6.3
`7.4.0`	affected	≤ 7.4.8
`7.2.0`	affected	≤ 7.2.11
`7.0.0`	affected	≤ 7.0.17

Fortinet

FortiProxy

unaffected

Version	Status	Constraints
`7.6.0`	affected	≤ 7.6.3
`7.4.0`	affected	≤ 7.4.10
`7.2.0`	affected	≤ 7.2.14
`7.0.0`	affected	≤ 7.0.21

Configuration 1 [-]

OR	cpe:2.3:a:fortinet:fortiproxy::::::::
	cpe:2.3:a:fortinet:fortiproxy::::::::
	cpe:2.3:a:fortinet:fortiproxy::::::::
	cpe:2.3:a:fortinet:fortiproxy::::::::
	cpe:2.3:a:fortinet:fortiswitchmanager::::::::
	cpe:2.3:a:fortinet:fortiswitchmanager::::::::
	cpe:2.3:o:fortinet:fortios::::::::
	cpe:2.3:o:fortinet:fortios::::::::
	cpe:2.3:o:fortinet:fortios::::::::
	cpe:2.3:o:fortinet:fortios::::::::

Configuration 2 [-]

AND

cpe:2.3:o:siemens:ruggedcom_ape1808_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:ruggedcom_ape1808:-:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

Vendor Solution

Upgrade to FortiSwitchManager version 7.2.7 or above Upgrade to FortiSwitchManager version 7.0.6 or above Upgrade to FortiProxy version 7.6.4 or above Upgrade to FortiProxy version 7.4.11 or above Upgrade to FortiProxy version 7.2.15 or above Upgrade to FortiProxy version 7.0.22 or above Upgrade to FortiOS version 7.6.4 or above Upgrade to FortiOS version 7.4.9 or above Upgrade to FortiOS version 7.2.12 or above Upgrade to FortiOS version 7.0.18 or above Upgrade to FortiWeb version 8.0.1 or above Upgrade to FortiWeb version 7.6.5 or above Upgrade to FortiWeb version 7.4.10 or above Fortinet remediated this issue in FortiSASE version 25.3.b and hence customers do not need to perform any action. Upgrade to FortiPAM version 1.8.0 or above

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is in the KEV database since Dec. 16, 2025.

Exploit prediction score: 68.1% (68.087% probability within 30 days)

Exploitation active

Automatable yes

Technical Impact total

References

Link	Providers
https://arcticwolf.com/resources/blog/arctic-wolf-observes-malicious-sso-logins-following-disclosure-cve-2025-59718-cve-2025-59719/
https://cert-portal.siemens.com/productcert/html/ssa-864900.html
https://fortiguard.fortinet.com/psirt/FG-IR-25-647
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59718

History

Jun 9, 2026 1:00 PM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Siemens Siemens ruggedcom Ape1808 Siemens ruggedcom Ape1808 Firmware
CPEs		cpe:2.3:h:siemens:ruggedcom_ape1808:-:::::::* cpe:2.3:o:siemens:ruggedcom_ape1808_firmware:-:::::::*
Vendors & Products		Siemens Siemens ruggedcom Ape1808 Siemens ruggedcom Ape1808 Firmware

Jun 9, 2026 10:30 AM Added references View changes

Type	Values Removed	Values Added
References		https://cert-portal.siemens.com/productcert/html/ssa-864900.html

Dec 16, 2025 10:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`	ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Dec 16, 2025 7:30 PM Added references View changes

Type	Values Removed	Values Added
References		https://arcticwolf.com/resources/blog/arctic-wolf-observes-malicious-sso-logins-following-disclosure-cve-2025-59718-cve-2025-59719/ https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59718

Dec 16, 2025 7:00 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		kev `{'dateAdded': '2025-12-16T00:00:00+00:00', 'dueDate': '2025-12-23T00:00:00+00:00'}`

Dec 9, 2025 8:15 PM Affected versions updated View changes

Type	Values Removed	Values Added
CPEs		cpe:2.3:a:fortinet:fortiproxy:::::::: cpe:2.3:a:fortinet:fortiswitchmanager:::::::: cpe:2.3:o:fortinet:fortios::::::::

Dec 9, 2025 6:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Dec 9, 2025 5:45 PM Description updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
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.
First Time appeared		Fortinet Fortinet fortios Fortinet fortiproxy Fortinet fortiswitchmanager
Weaknesses		CWE-347
CPEs		cpe:2.3:a:fortinet:fortiproxy:7.0.0:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.10:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.11:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.12:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.13:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.14:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.15:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.16:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.17:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.18:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.19:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.1:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.20:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.21:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.2:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.3:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.4:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.5:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.6:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.7:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.8:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.9:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.0:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.10:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.11:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.12:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.13:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.14:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.1:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.2:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.3:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.4:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.5:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.6:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.7:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.8:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.9:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.0:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.10:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.1:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.2:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.3:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.4:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.5:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.6:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.7:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.8:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.9:::::::* cpe:2.3:a:fortinet:fortiproxy:7.6.0:::::::* cpe:2.3:a:fortinet:fortiproxy:7.6.1:::::::* cpe:2.3:a:fortinet:fortiproxy:7.6.2:::::::* cpe:2.3:a:fortinet:fortiproxy:7.6.3:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.0.0:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.0.1:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.0.2:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.0.3:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.0.4:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.0.5:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.2.0:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.2.1:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.2.2:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.2.3:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.2.4:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.2.5:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.2.6:::::::* cpe:2.3:o:fortinet:fortios:7.0.0:::::::* cpe:2.3:o:fortinet:fortios:7.0.10:::::::* cpe:2.3:o:fortinet:fortios:7.0.11:::::::* cpe:2.3:o:fortinet:fortios:7.0.12:::::::* cpe:2.3:o:fortinet:fortios:7.0.13:::::::* cpe:2.3:o:fortinet:fortios:7.0.14:::::::* cpe:2.3:o:fortinet:fortios:7.0.15:::::::* cpe:2.3:o:fortinet:fortios:7.0.16:::::::* cpe:2.3:o:fortinet:fortios:7.0.17:::::::* cpe:2.3:o:fortinet:fortios:7.0.1:::::::* cpe:2.3:o:fortinet:fortios:7.0.2:::::::* cpe:2.3:o:fortinet:fortios:7.0.3:::::::* cpe:2.3:o:fortinet:fortios:7.0.4:::::::* cpe:2.3:o:fortinet:fortios:7.0.5:::::::* cpe:2.3:o:fortinet:fortios:7.0.6:::::::* cpe:2.3:o:fortinet:fortios:7.0.7:::::::* cpe:2.3:o:fortinet:fortios:7.0.8:::::::* cpe:2.3:o:fortinet:fortios:7.0.9:::::::* cpe:2.3:o:fortinet:fortios:7.2.0:::::::* cpe:2.3:o:fortinet:fortios:7.2.10:::::::* cpe:2.3:o:fortinet:fortios:7.2.11:::::::* cpe:2.3:o:fortinet:fortios:7.2.1:::::::* cpe:2.3:o:fortinet:fortios:7.2.2:::::::* cpe:2.3:o:fortinet:fortios:7.2.3:::::::* cpe:2.3:o:fortinet:fortios:7.2.4:::::::* cpe:2.3:o:fortinet:fortios:7.2.5:::::::* cpe:2.3:o:fortinet:fortios:7.2.6:::::::* cpe:2.3:o:fortinet:fortios:7.2.7:::::::* cpe:2.3:o:fortinet:fortios:7.2.8:::::::* cpe:2.3:o:fortinet:fortios:7.2.9:::::::* cpe:2.3:o:fortinet:fortios:7.4.0:::::::* cpe:2.3:o:fortinet:fortios:7.4.1:::::::* cpe:2.3:o:fortinet:fortios:7.4.2:::::::* cpe:2.3:o:fortinet:fortios:7.4.3:::::::* cpe:2.3:o:fortinet:fortios:7.4.4:::::::* cpe:2.3:o:fortinet:fortios:7.4.5:::::::* cpe:2.3:o:fortinet:fortios:7.4.6:::::::* cpe:2.3:o:fortinet:fortios:7.4.7:::::::* cpe:2.3:o:fortinet:fortios:7.4.8:::::::* cpe:2.3:o:fortinet:fortios:7.6.0:::::::* cpe:2.3:o:fortinet:fortios:7.6.1:::::::* cpe:2.3:o:fortinet:fortios:7.6.2:::::::* cpe:2.3:o:fortinet:fortios:7.6.3:::::::*
Vendors & Products		Fortinet Fortinet fortios Fortinet fortiproxy Fortinet fortiswitchmanager
References		https://fortiguard.fortinet.com/psirt/FG-IR-25-647
Metrics		cvssV3_1 `{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C'}`