CVE-2025-59718

EUVD-2025-202198
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
fortinetCNA
9.1 CRITICAL
NETWORK
LOW
NONE
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
Base Score
CVSS 3.x
EPSS Score
Percentile: 84%
Affected Products (NVD)
VendorProductVersion
fortinetfortiproxy
7.0.0 ≤
𝑥
< 7.0.22
fortinetfortiproxy
7.2.0 ≤
𝑥
< 7.2.15
fortinetfortiproxy
7.4.0 ≤
𝑥
< 7.4.11
fortinetfortiproxy
7.6.0 ≤
𝑥
< 7.6.4
fortinetfortiswitchmanager
7.0.0 ≤
𝑥
< 7.0.6
fortinetfortiswitchmanager
7.2.0 ≤
𝑥
< 7.2.7
fortinetfortios
7.0.0 ≤
𝑥
< 7.0.18
fortinetfortios
7.2.0 ≤
𝑥
< 7.2.12
fortinetfortios
7.4.0 ≤
𝑥
< 7.4.9
fortinetfortios
7.6.0 ≤
𝑥
< 7.6.4
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://fortiguard.fortinet.com/psirt/FG-IR-25-647
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