Fortinet FortiNAC-F up to 7.2.9/7.4.3/7.6.5 CSV File Parser redirect

Summaryinfo

A vulnerability described as problematic has been identified in Fortinet FortiNAC-F up to 7.2.9/7.4.3/7.6.5. This affects an unknown part of the component CSV File Parser. The manipulation results in redirect. This vulnerability was named CVE-2026-21741. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Fortinet FortiNAC-F up to 7.2.9/7.4.3/7.6.5. Affected is an unknown code block of the component CSV File Parser. The manipulation with an unknown input leads to a redirect vulnerability. CWE is classifying the issue as CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. This is going to have an impact on integrity. CVE summarizes:

An URL Redirection to Untrusted Site ('Open Redirect') vulnerability [CWE-601] vulnerability in Fortinet FortiNAC-F 7.6.0 through 7.6.5, FortiNAC-F 7.4 all versions, FortiNAC-F 7.2 all versions may allow a remote privileged attacker with system administrator role to redirect users to an arbitrary website via crafted CSV file.

The advisory is shared for download at fortiguard.fortinet.com. This vulnerability is traded as CVE-2026-21741 since 01/05/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Additional levels of successful authentication are necessary for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1204.001.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Fortinet

Name

• FortiNAC-F

Version

• 7.2.0
• 7.2.1
• 7.2.2
• 7.2.3
• 7.2.4
• 7.2.5
• 7.2.6
• 7.2.7
• 7.2.8
• 7.2.9
• 7.4.0
• 7.4.1
• 7.4.2
• 7.4.3
• 7.6.0
• 7.6.1
• 7.6.2
• 7.6.3
• 7.6.4
• 7.6.5

License

• commercial

Website

• Vendor: https://www.fortinet.com/

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