CVE-2012-10039CWE-78

ZEN Load Balancer Filelog Command Execution

Critical · published August 11, 2025

CVSS v4.0
9.4
EPSS
3%
Percentile
88.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
9.4 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
EPSS
0.03418 · 88.8th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2025-08-11T14:55Z
EPSS history
Timeline
  • 11 AUG 14:55Z
    ZEN Load Balancer Filelog Command Execution
    cvelistv5