CVE-2021-41026 Path traversal in Fortinet FortiWeb

What is CVE-2021-41026?

CVE-2021-41026 is a medium-severity path traversal vulnerability in Fortinet Fortiweb, published on 6 Apr 2022. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A relative path traversal in FortiWeb versions 6.4.1, 6.4.0, and 6.3.0 through 6.3.15 may allow an authenticated attacker to retrieve arbitrary files from the underlying filesystem via specially crafted web requests.

Weakness: CWE-22

Which versions are affected by CVE-2021-41026?

It affects 1 product.

Products include Fortinet Fortiweb.

How do I fix CVE-2021-41026?

No fix has been published for CVE-2021-41026 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2021-41026 being exploited?

There is no known exploitation of CVE-2021-41026 in the wild and no public exploit code.

Other vulnerabilities in Fortinet Fortiweb

• CVE-2025-25257 Fortinet FortiWeb SQL Injection Exploited Critical 9.6
• CVE-2025-64446 Fortinet FortiWeb Path Traversal Exploited Critical 9.4
• CVE-2025-58034 Fortinet FortiWeb OS Command Injection Exploited Medium 6.7
• CVE-2020-29015 SQL injection in Fortinet FortiWeb Critical 9.8
• CVE-2020-29016 Memory corruption in Fortinet FortiWeb Critical 9.8

All Fortinet Fortiweb vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-pf39-475g-67qc.