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CVE

CWE

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CVE-2012-10039

Published: Aug 11, 2025

Modified: Apr 7, 2026

PUBLISHED

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.

Vendor	Product	Versions
ZEN Load Balancer	ZEN Load Balancer	affected `2.0` affected `3.0-rc1`

Weaknesses (CWE)

References

https://web.archive.org/web/20221203195056/https://itsecuritysolutions.org/2012-09-21-ZEN-Load-Balancer-v2.0-and-v3.0-rc1-multiple-vulnerabilities/

technical-description

exploit

https://web.archive.org/web/20111015031540/http://www.zenloadbalancer.com/

product

https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/linux/http/zen_load_balancer_exec.rb

exploit

https://www.exploit-db.com/exploits/21849

exploit

https://www.fortiguard.com/encyclopedia/ips/33335/zen-load-balancer-filelog-command-execution

third-party-advisory

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