Type Vulnerability
Please be aware that CVE-2025-59719 pertains to the same problem and is mentioned in the same vendor advisory. Known-exploited catalogue reports exploitation in the wild.
Apple
Fortinet Multiple Products Signature Verification Flaw Vulnerability
CVE-2025-59718
What this means
This is rated critical severity (9.8 out of 10). It is on the known-exploited catalogue, which means attacks using it have already been seen. Ask IT whether Fortinet Fortiproxy, Fortinet Fortiswitchmanager and Fortinet Fortios, and 2 more are in your estate, and treat that as the priority.
Full vendor 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.
Scoring and exploitation
9.8/ 10
CVSS 3.1 base scoreCritical
Exploitable over the network without any account, and no one has to click or open anything. High impact on confidentiality, integrity and availability.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability
Longer bar: easier to attack
Attack vectorNetworkAV:N
Attack complexityLowAC:L
Privileges requiredNonePR:N
User interactionNoneUI:N
ScopeUnchangedS:U
Impact
Longer bar: more harm
ConfidentialityHighC:H
IntegrityHighI:H
AvailabilityHighA:H
- Elevated attack likelihood (~68.3% in 30 days)Model estimate (): a probability signal, not confirmed exploitation
- Exploited in the wild
- Yes — confirmed exploitation (US CISA )
- Not reported
- Listed product
- Fortinet Multiple Products
Weaknesses
CWE-347
Affected products ()
- Fortinet Fortiproxy
- Fortinet Fortiswitchmanager
- Fortinet Fortios
- Siemens Ruggedcom ape1808 Firmware
- Siemens Ruggedcom ape1808
Show the raw CPE strings (5)
- cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*
- cpe:2.3:a:fortinet:fortiswitchmanager:*:*:*:*:*:*:*:*
- cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:ruggedcom_ape1808_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:h:siemens:ruggedcom_ape1808:-:*:*:*:*:*:*:*
References
4 links from the CVE record, grouped by site; the vendor's advisory comes first.
fortiguard.fortinet.com1 linkVendor advisory
- FG-IR-25-647 (opens in a new tab)Vendor Advisory
arcticwolf.com1 link
cert-portal.siemens.com1 link
- ssa-864900.html (opens in a new tab)Third Party Advisory
cisa.gov1 link
- known-exploited-vulnerabilities-catalog (opens in a new tab)US Government Resource