Vulnerability details
CVE-2025-59718
Actively exploited
Fortinet FortiOSFortinet FortiProxyFortinet FortiSwitchManagerSiemens RUGGEDCOM APE1808
CVSS 3.1
9.1Critical
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.1Critical | 3.1 | CVEProject cvelistV5 (CNA) (fortinet) | 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 |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Fortinet | FortiOS | 7.0.0 ≤ v ≤ 7.0.17 | CVEProject cvelistV5 (CNA) |
| Fortinet | FortiOS | 7.2.0 ≤ v ≤ 7.2.11 | CVEProject cvelistV5 (CNA) |
| Fortinet | FortiOS | 7.4.0 ≤ v ≤ 7.4.8 | CVEProject cvelistV5 (CNA) |
| Fortinet | FortiOS | 7.6.0 ≤ v ≤ 7.6.3 | CVEProject cvelistV5 (CNA) |
| Fortinet | FortiProxy | 7.0.0 ≤ v ≤ 7.0.21 | CVEProject cvelistV5 (CNA) |
| Fortinet | FortiProxy | 7.2.0 ≤ v ≤ 7.2.14 | CVEProject cvelistV5 (CNA) |
| Fortinet | FortiProxy | 7.4.0 ≤ v ≤ 7.4.10 | CVEProject cvelistV5 (CNA) |
| Fortinet | FortiProxy | 7.6.0 ≤ v ≤ 7.6.3 | CVEProject cvelistV5 (CNA) |
| Fortinet | FortiSwitchManager | 7.0.0 ≤ v ≤ 7.0.5 | CVEProject cvelistV5 (CNA) |
| Fortinet | FortiSwitchManager | 7.2.0 ≤ v ≤ 7.2.6 | CVEProject cvelistV5 (CNA) |
| Siemens | RUGGEDCOM APE1808 | All | CVEProject cvelistV5 (CNA) |
References and advisories
4- 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/ third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59718 government-resource
- https://cert-portal.siemens.com/productcert/html/ssa-864900.html
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Details
- Published
- 2025-12-09
- Last updated
- 2026-10-15
- State
- Published
- Assigner (CNA)
- fortinet
- Kolun priority
- 89 · Critical
CISA KEV catalog
- Date added
- 2025-12-16
- Due date
- 2025-12-23
- Used in ransomware
- Unknown
Exploit prediction (EPSS)
68.08%
Probability of exploitation in 30 days
99.3%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Active
- Technical impact
- Total
Weaknesses (CWE)
- CWE-347Improper access control