CVE-2025-59718Critical· 9.1▾ Hadal⚠ Exploited in the wildPoC availableA 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…
▾ Hadal zone — Critical and actively exploited (CISA KEV / 0day)
impact 50.1 · likelihood 13.7 · exploitation 25
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Federal remediation due Dec 23, 2025
Last analysed / modified upstream
68%
2 GitHub repos (last check)
Added to the CISA catalog on Dec 16, 2025. Federal remediation due Dec 23, 2025. View catalog ↗
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.
FortiSwitchManager >= 7.2.0 <= 7.2.6FortiSwitchManager >= 7.0.0 <= 7.0.5FortiOS >= 7.6.0 <= 7.6.3FortiOS >= 7.4.0 <= 7.4.8FortiOS >= 7.2.0 <= 7.2.11FortiOS >= 7.0.0 <= 7.0.17FortiProxy >= 7.6.0 <= 7.6.3FortiProxy >= 7.4.0 <= 7.4.10FortiProxy >= 7.2.0 <= 7.2.14FortiProxy >= 7.0.0 <= 7.0.21Upgrade 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
Connected by shared product, vendor, weakness, or advisory.
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