9.8 CVE-2025-59718
Enriched by CISA CISA Kev Catalog Exploit
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.
https://nvd.nist.gov/vuln/detail/CVE-2025-59718
Categories
CWE-347 : Improper Verification of Cryptographic Signature
The product does not verify, or incorrectly verifies, the cryptographic signature for data. Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.) Does not properly verify signatures for "trusted" entities. Insufficient verification allows spoofing. Insufficient verification allows spoofing. Accepts a configuration file without a Message Integrity Check (MIC) signature.
References
134c704f-9b21-4f2e-91b3-4a467353bcc0
| https://arcticwolf.com/resources/blog/arctic-wolf-observes-malicious-sso-logi... Third Party Advisory |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-20... US Government Resource |
psirt@fortinet.com
| https://fortiguard.fortinet.com/psirt/FG-IR-25-647 Vendor Advisory |
AFFECTED (from MITRE)
| Vendor | Product | Versions |
|---|---|---|
| Fortinet | FortiSwitchManager |
|
| Fortinet | FortiOS |
|
| Fortinet | FortiProxy |
|
| © 2022 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. | ||
CPE
| cpe | start | end |
|---|---|---|
| Configuration 1 | ||
| cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:* | >= 7.0.0 | < 7.0.22 |
| cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:* | >= 7.2.0 | < 7.2.15 |
| cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:* | >= 7.4.0 | < 7.4.11 |
| cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:* | >= 7.6.0 | < 7.6.4 |
| cpe:2.3:a:fortinet:fortiswitchmanager:*:*:*:*:*:*:*:* | >= 7.0.0 | < 7.0.6 |
| cpe:2.3:a:fortinet:fortiswitchmanager:*:*:*:*:*:*:*:* | >= 7.2.0 | < 7.2.7 |
| cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* | >= 7.0.0 | < 7.0.18 |
| cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* | >= 7.2.0 | < 7.2.12 |
| cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* | >= 7.4.0 | < 7.4.9 |
| cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* | >= 7.6.0 | < 7.6.4 |
REMEDIATION
EXPLOITS
Exploit-db.com
| id | description | date | |
|---|---|---|---|
| No known exploits | |||
POC Github
| Url |
|---|
| https://github.com/Ashwesker/Blackash-CVE-2025-59718 |
| https://github.com/exfil0/CVE-2025-59718-PoC |
| https://github.com/moften/CVE-2025-59718-Fortinet-Poc |
Other Nist (github, ...)
| Url |
|---|
| No known exploits |
CAPEC
Common Attack Pattern Enumerations and Classifications
| id | description | severity |
|---|---|---|
| 463 | Padding Oracle Crypto Attack |
High |
| 475 | Signature Spoofing by Improper Validation |
High |
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