CVE-2021-41016 Command injection in n/a

What is CVE-2021-41016?

CVE-2021-41016 is a high-severity command injection vulnerability in n/a, published on 2 Feb 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A improper neutralization of special elements used in a command ('command injection') in Fortinet FortiExtender version 7.0.1 and below, 4.2.3 and below, 4.1.7 and below allows an authenticated attacker to execute privileged shell commands via CLI commands including special characters

Weakness: CWE-78

Which versions are affected by CVE-2021-41016?

It affects 1 product.

Products include Fortinet Fortiextender Firmware.

How do I fix CVE-2021-41016?

No fix has been published for CVE-2021-41016 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2021-41016 being exploited?

There is no known exploitation of CVE-2021-41016 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2024-23663 Privilege escalation in FortiExtender High 8.1
• CVE-2022-23447 Path traversal in FortiExtender High 7.3
• CVE-2022-27489 Command injection in FortiExtender High 7.0
• CVE-2025-64153 Command injection in FortiExtender Medium 6.7
• CVE-2025-46776 Memory corruption in FortiExtender Medium 6.3

Sources

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

Also known as GHSA-8h76-r3wq-wvqp.