CVE-2012-10039Public exploitNetwork attack vector

Root command execution via unsanitized filelog parameter

Published Aug 11, 2025 · Updated Apr 7, 2026

Command injection in ZEN Load Balancer 2.0 and 3.0-rc1 allows remote authenticated users to execute shell commands as root. The content2-2.cgi log viewer passes the filelog parameter directly into a backtick-delimited exec() call without sanitizing shell metacharacters. Access to the authenticated web interface is required; injected commands run with root privileges and can read, alter, or interrupt the appliance.

CVSS severity9.4
Critical
EPSS probability2.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in ZEN Load Balancer 2.0 and 3.0-rc1 allows remote authenticated users to execute shell commands as root. The content2-2.cgi log viewer passes the filelog parameter directly into a backtick-delimited exec() call without sanitizing shell metacharacters. Access to the authenticated web interface is required; injected commands run with root privileges and can read, alter, or interrupt the appliance.

The record

CVE
CVE-2012-10039
Published
Aug 11, 2025
Updated
Apr 7, 2026
Vendor
Zen Load Balancer
Product
Zen Load Balancer
Classifications
CWE-78, T1190, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0
  2. Affected versionversion=3.0-rc1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zen Load Balancer · Zen Load Balancerversion=2.0; version=3.0-rc1

Published CVSS scores

9.4VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1190Exploit Public-Facing Application
T1059.004Command and Scripting Interpreter: Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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