CVE-2012-10039 ZEN Load Balancer Filelog Command Execution
Authenticated attackers can execute arbitrary shell commands as root via the filelog parameter in ZEN Load Balancer.
- 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-2012-10039?
CVE-2012-10039 is a critical command injection vulnerability in ZEN Load Balancer, published on 11 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
ZEN Load Balancer versions 2.0 and 3.0-rc1 contain a command injection vulnerability in content2-2.cgi. The filelog parameter is passed directly into a backtick-delimited exec() call without sanitation. An authenticated attacker can inject arbitrary shell commands, resulting in remote code execution as the root user. ZEN Load Balancer is the predecessor of ZEVENET and SKUDONET. The affected versions (2.0 and 3.0-rc1) are no longer supported. SKUDONET CE is the current community-maintained successor.
Weakness: CWE-78
Which versions are affected by CVE-2012-10039?
How do I fix CVE-2012-10039?
No fix has been published for CVE-2012-10039 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-2012-10039 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2012-10039 exists.
Public exploit code: 1 Metasploit module.
Sources
Also known as GHSA-v54w-jgw5-2q48.