CVE-2022-23438

An improper neutralization of input during web page generation 'Cross-site Scripting' CWE-79 vulnerability in FortiOS version 7.0.5 and prior and 6.4.9 and prior may allow an unauthenticated remote attacker to perform a reflected cross site scripting XSS attack in the captive portal authenticatio...

CVE-2022-42472

A improper neutralization of crlf sequences in http headers 'http response splitting' in Fortinet FortiOS versions 7.2.0 through 7.2.2, 7.0.0 through 7.0.8, 6.4.0 through 6.4.11, 6.2.0 through 6.2.12, 6.0.0 through 6.0.16, FortiProxy 7.2.0 through 7.2.1, 7.0.0 through 7.0.7, 2.0.0 through 2.0.10,...

CVE-2022-26122

An insufficient verification of data authenticity vulnerability CWE-345 in FortiClient, FortiMail and FortiOS AV engines version 6.2.168 and below and version 6.4.274 and below may allow an attacker to bypass the AV engine via manipulating MIME attachment with junk and pad characters in base64...

CVE-2020-12820

Under non-default configuration, a stack-based buffer overflow in FortiOS version 6.0.10 and below, version 5.6.12 and below may allow a remote attacker authenticated to the SSL VPN to crash the FortiClient NAC daemon fcnacd and potentially execute arbitrary code via requesting a large FortiClien...

CVE-2023-25610

A buffer underwrite 'buffer underflow' vulnerability in the administrative interface of Fortinet FortiOS version 7.2.0 through 7.2.3, version 7.0.0 through 7.0.6, version 6.4.0 through 6.4.11 and version 6.2.12 and below, FortiProxy version 7.2.0 through 7.2.2, version 7.0.0 through 7.0.8, versio...

CVE-2023-29183

An improper neutralization of input during web page generation 'Cross-site Scripting' vulnerability CWE-79 in FortiProxy 7.2.0 through 7.2.4, 7.0.0 through 7.0.10 and FortiOS 7.2.0 through 7.2.4, 7.0.0 through 7.0.11, 6.4.0 through 6.4.12, 6.2.0 through 6.2.14 GUI may allow an authenticated...

CVE-2023-29181

A use of externally-controlled format string in Fortinet FortiOS 7.2.0 through 7.2.4, 7.0.0 through 7.0.11, 6.4.0 through 6.4.12, 6.2.0 through 6.2.14, 6.0.0 through 6.0.16, FortiProxy 7.2.0 through 7.2.4, 7.0.0 through 7.0.10, 2.0.0 through 2.0.12, 1.2.0 through 1.2.13, 1.1.0 through 1.1.6, 1.0....

CVE-2023-50176

A session fixation in Fortinet FortiOS version 7.4.0 through 7.4.3 and 7.2.0 through 7.2.7 and 7.0.0 through 7.0.13 allows attacker to execute unauthorized code or commands via phishing SAML authentication link...

CVE-2022-42476

A relative path traversal vulnerability CWE-23 in Fortinet FortiOS version 7.2.0 through 7.2.2, 7.0.0 through 7.0.8 and before 6.4.11, FortiProxy version 7.2.0 through 7.2.2 and 7.0.0 through 7.0.8 allows privileged VDOM administrators to escalate their privileges to super admin of the box via...

CVE-2022-42475

A heap-based buffer overflow vulnerability CWE-122 in FortiOS SSL-VPN 7.2.0 through 7.2.2, 7.0.0 through 7.0.8, 6.4.0 through 6.4.10, 6.2.0 through 6.2.11, 6.0.15 and earlier and FortiProxy SSL-VPN 7.2.0 through 7.2.1, 7.0.7 and earlier may allow a remote unauthenticated attacker to execute...

CVE-2022-35843

An authentication bypass by assumed-immutable data vulnerability CWE-302 in the FortiOS SSH login component 7.2.0, 7.0.0 through 7.0.7, 6.4.0 through 6.4.9, 6.2 all versions, 6.0 all versions and FortiProxy SSH login component 7.0.0 through 7.0.5, 2.0.0 through 2.0.10, 1.2.0 all versions may allo...

The vulnerability of the SAML Response Message Handler component in FortiOS operating systems, FortiWeb network layer for web applications, FortiProxy proxy server for protecting against internet attacks, and FortiSwitchManager local management platform allows attackers to bypass existing security mechanisms.

The vulnerability of the SAML Response Message Handler component in FortiOS operating systems, FortiWeb network layer for web applications, FortiProxy proxy server for protecting against internet attacks, and the local management platform FortiSwitchManager is related to deficiencies in the...

CVE-2022-27491

A improper verification of source of a communication channel in Fortinet FortiOS with IPS engine version 7.201 through 7.214, 7.001 through 7.113, 6.001 through 6.121, 5.001 through 5.258 and before 4.086 allows a remote and unauthenticated attacker to trigger the sending of "blocked page" HTML...

CVE-2019-16151

An improper neutralization of input during web page generation vulnerability CWE-79 in FortiOS 6.4.1 and below, 6.2.9 and below may allow a remote unauthenticated attacker to either redirect users to malicious websites via a crafted "Host" header or to execute JavaScript code in the victim's...

PT-2025-54218

Name of the Vulnerable Software and Affected Versions FortiOS affected versions not specified Description A flaw in FortiOS allows bypassing of multi-factor authentication MFA through manipulation of username case. This issue is currently being exploited. The exploitation involves tricking the...

Critical vulnerabilities in Fortinet CVE-2025-59718, CVE-2025-59719, CVE-2026-24858 exploited in the wild

Overview Update for CVE-2026-24858: On January 27, 2026, Fortinet disclosedCVE-2026-24858 , a critical unauthenticated vulnerability allowing authentication bypass via Fortinet’s cloud SSO. Confirmed as a net-new vulnerability rather than a patch bypass, it has beenobserved under active zero-day...

Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability

Fortinet FortiOS, FortiSwitchMaster, FortiProxy, and FortiWeb contain an improper verification of cryptographic signature vulnerability that may allow an unauthenticated attacker to bypass the FortiCloud SSO login authentication via a crafted SAML message. Please be aware that CVE-2025-59719...

VulnCheck KEV: CVE-2025-59718

Fortinet FortiOS, FortiSwitchMaster, FortiProxy, and FortiWeb contain an improper verification of cryptographic signature vulnerability that may allow an unauthenticated attacker to bypass the FortiCloud SSO login authentication via a crafted SAML message. Please be aware that CVE-2025-59719...

CVE-2024-40593

A key management errors vulnerability in Fortinet FortiAnalyzer 7.4.0 through 7.4.2, FortiAnalyzer 7.2.0 through 7.2.5, FortiAnalyzer 7.0 all versions, FortiAnalyzer 6.4 all versions, FortiManager 7.4.0 through 7.4.2, FortiManager 7.2.0 through 7.2.5, FortiManager 7.0 all versions, FortiManager 6...

CVE-2024-40593

A key management errors vulnerability in Fortinet FortiAnalyzer 7.4.0 through 7.4.2, FortiAnalyzer 7.2.0 through 7.2.5, FortiAnalyzer 7.0 all versions, FortiAnalyzer 6.4 all versions, FortiManager 7.4.0 through 7.4.2, FortiManager 7.2.0 through 7.2.5, FortiManager 7.0 all versions, FortiManager 6...