CVE-2021-4466 IPCop <= 2.1.9 Authenticated RCE
Authenticated attackers can execute arbitrary OS commands via the email configuration interface, leading to full system compromise.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-4466?
CVE-2021-4466 is a high-severity command injection vulnerability in IPCop, published on 14 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IPCop versions up to and including 2.1.9 contain an authenticated remote code execution vulnerability within the web-based administration interface. The email configuration component inserts user-controlled values, including the EMAIL_PW parameter, directly into system-level operations without proper input sanitation. By modifying the email password field to include shell metacharacters and issuing a save-and-test-mail action, an authenticated attacker can execute arbitrary operating system commands with the privileges of the web interface, resulting in full system compromise.
Weakness: CWE-78
Which versions are affected by CVE-2021-4466?
How do I fix CVE-2021-4466?
No fix has been published for CVE-2021-4466 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-2021-4466 being exploited?
There is no known exploitation of CVE-2021-4466 in the wild and no public exploit code.
Sources
Also known as GHSA-vggq-52m7-59x7.