CVE-2025-59718A 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, Fort…
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It affects Fortinet FortiSwitchManager and 4 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Dec 16, 2025; federal agencies had to remediate by Dec 23, 2025. Treat that date as your deadline.
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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.
- CVSS
- 9.1 CRITICAL (v3.1, CNA)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
- Weakness (CWE)
- CWE-347
- Known exploited
- Added to CISA KEV Dec 16, 2025; federal remediation due Dec 23, 2025Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 68.29% (percentile 99)
- Assigned by
- fortinet
- NVD analysis
- Analyzed
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Fortinet FortiSwitchManager fortinet:fortiswitchmanager | from 7.2.0 through 7.2.6; from 7.0.0 through 7.0.5 | CNA record |
Fortinet FortiOS fortinet:fortios | from 7.6.0 through 7.6.3; from 7.4.0 through 7.4.8; from 7.2.0 through 7.2.11; from 7.0.0 through 7.0.17 | CNA record |
Fortinet FortiProxy fortinet:fortiproxy | from 7.6.0 through 7.6.3; from 7.4.0 through 7.4.10; from 7.2.0 through 7.2.14; from 7.0.0 through 7.0.21 | CNA record |
Siemens RUGGEDCOM APE1808 siemens:ruggedcom_ape1808 (from the name) | all versions | CISA ADP |
fortinet fortiproxy fortinet:fortiproxy | from 7.0.0 before 7.0.22; from 7.2.0 before 7.2.15; from 7.4.0 before 7.4.11; from 7.6.0 before 7.6.4 | NVD |
fortinet fortiswitchmanager fortinet:fortiswitchmanager | from 7.0.0 before 7.0.6; from 7.2.0 before 7.2.7 | NVD |
fortinet fortios fortinet:fortios | from 7.0.0 before 7.0.18; from 7.2.0 before 7.2.12; from 7.4.0 before 7.4.9; from 7.6.0 before 7.6.4 | NVD |
siemens ruggedcom_ape1808_firmware siemens:ruggedcom_ape1808_firmware | all versions | NVD |
References
- https://fortiguard.fortinet.com/psirt/FG-IR-25-647vendor-advisory
- https://arcticwolf.com/resources/blog/arctic-wolf-observes-malicious-sso-logins-following-disclosure-cve-2025-59718-cve-2025-59719/third-party-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-864900.htmlthird-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59718us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.