9.8 CVE-2025-59718

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

psirt@fortinet.com

https://fortiguard.fortinet.com/psirt/FG-IR-25-647 Vendor Advisory

CPE

cpe	start	end
Configuration 1
cpe:2.3:a:fortinet:fortiproxy::::::::	>= 7.0.0	<= 7.0.21
cpe:2.3:a:fortinet:fortiproxy::::::::	>= 7.2.0	<= 7.2.14
cpe:2.3:a:fortinet:fortiproxy::::::::	>= 7.4.0	<= 7.4.10
cpe:2.3:a:fortinet:fortiproxy::::::::	>= 7.6.0	<= 7.6.3
cpe:2.3:a:fortinet:fortiswitchmanager::::::::	>= 7.0.0	<= 7.0.5
cpe:2.3:a:fortinet:fortiswitchmanager::::::::	>= 7.2.0	<= 7.2.6
cpe:2.3:o:fortinet:fortios::::::::	>= 7.0.0	<= 7.0.17
cpe:2.3:o:fortinet:fortios::::::::	>= 7.2.0	<= 7.2.11
cpe:2.3:o:fortinet:fortios::::::::	>= 7.4.0	<= 7.4.8
cpe:2.3:o:fortinet:fortios::::::::	>= 7.6.0	<= 7.6.3

REMEDIATION

EXPLOITS

Exploit-db.com

id	description	date
No known exploits

POC Github

Url
https://github.com/Ashwesker/Blackash-CVE-2025-59718

Other Nist (github, ...)

Url
No known exploits

CAPEC

Common Attack Pattern Enumerations and Classifications

id	description	severity
463	Padding Oracle Crypto Attack An adversary is able to efficiently decrypt data without knowing the decryption key if a target system leaks data on whether or not a padding error happened while decrypting the ciphertext. A target system that leaks this type of information becomes the padding oracle and an adversary is able to make use of that oracle to efficiently decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block). In addition to performing decryption, an adversary is also able to produce valid ciphertexts (i.e., perform encryption) by using the padding oracle, all without knowing the encryption key.	High
475	Signature Spoofing by Improper Validation An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.	High

Cybersecurity needs ?

Strengthen software security from the outset with our DevSecOps expertise

Integrate security right from the start of the software development cycle for more robust applications and greater customer confidence.
Our team of DevSecOps experts can help you secure your APIs, data pipelines, CI/CD chains, Docker containers and Kubernetes deployments.

Discover this offer

Soutenez No Hack Me sur Tipeee