CVE-2021-36174 Denial of service in Fortinet FortiPortal

What is CVE-2021-36174?

CVE-2021-36174 is a medium-severity denial of service vulnerability in Fortinet FortiPortal, published on 2 Nov 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A memory allocation with excessive size value vulnerability in the license verification function of FortiPortal before 6.0.6 may allow an attacker to perform a denial of service attack via specially crafted license blobs.

Weakness: CWE-770

Which versions are affected by CVE-2021-36174?

It affects 1 product.

Products include Fortinet Fortiportal.

How do I fix CVE-2021-36174?

No fix has been published for CVE-2021-36174 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-36174 being exploited?

There is no known exploitation of CVE-2021-36174 in the wild and no public exploit code.

Other vulnerabilities in Fortinet FortiPortal

• CVE-2021-32590 SQL injection in Fortinet FortiPortal Critical 9.9
• CVE-2021-32588 Hardcoded credentials in Fortinet FortiPortal Critical 9.8
• CVE-2017-7342 Security feature bypass in Fortinet FortiPortal Critical 9.8
• CVE-2017-7337 Missing authorization in Fortinet FortiPortal Critical 9.1
• CVE-2025-24470 Path traversal in FortiPortal High 8.1

Sources

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

Also known as GHSA-vw22-2cvx-m8f8.