CVE-2021-22129 Memory corruption in Fortinet FortiMail

What is CVE-2021-22129?

CVE-2021-22129 is a high-severity memory corruption vulnerability in Fortinet FortiMail, published on 9 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Multiple instances of incorrect calculation of buffer size in the Webmail and Administrative interface of FortiMail before 6.4.5 may allow an authenticated attacker with regular webmail access to trigger a buffer overflow and to possibly execute unauthorized code or commands via specifically crafted HTTP requests.

Weakness: CWE-120

Which versions are affected by CVE-2021-22129?

It affects 1 product.

Products include Fortinet Fortimail.

How do I fix CVE-2021-22129?

No fix has been published for CVE-2021-22129 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-22129 being exploited?

There is no known exploitation of CVE-2021-22129 in the wild and no public exploit code.

Other vulnerabilities in Fortinet FortiMail

• CVE-2026-104286 Fortinet FortiMail Path Traversal Exploited Critical 9.8
• CVE-2021-36166 Auth bypass in Fortinet FortiMail Critical 9.8
• CVE-2021-24007 SQL injection in Fortinet FortiMail Critical 9.8
• CVE-2020-9294 Auth bypass in FortiMail Critical 9.8
• CVE-2023-47539 Auth bypass in FortiMail Critical 9.0

Sources

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

Also known as GHSA-4466-79c6-7gv2.