CVE-2026-40032: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') (CWE-78) in tclahr UAC
UAC (Unix-like Artifacts Collector) before 3.3.0-rc1 contains a command injection vulnerability in the placeholder substitution and command execution pipeline where the _run_command() function passes constructed command strings directly to eval without proper sanitization. Attackers can inject shell metacharacters or command substitutions through attacker-controlled inputs including %line% values from foreach iterators and %user% / %user_home% values derived from system files to achieve arbitrary command execution with the privileges of the UAC process.
AI Analysis
Technical Summary
CVE-2026-40032 is a command injection vulnerability in tclahr's UAC product prior to version 3.3.0-rc1. The issue arises because the _run_command() function passes constructed command strings directly to eval without proper input sanitization. Attacker-controlled inputs, including placeholder values like %line% from foreach iterators and %user% or %user_home% derived from system files, can be manipulated to inject shell metacharacters or command substitutions. This leads to arbitrary command execution under the privileges of the UAC process. The vulnerability is classified under CWE-78 (Improper Neutralization of Special Elements used in an OS Command).
Potential Impact
Successful exploitation allows an attacker to execute arbitrary OS commands with the privileges of the UAC process. This can lead to unauthorized system access, data compromise, or further system manipulation depending on the privileges of the UAC process. The CVSS 4.0 score of 8.5 reflects high impact due to the potential for high confidentiality, integrity, and availability damage.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch is currently documented. Until a patch is available, users should avoid running vulnerable versions or restrict access to the UAC process to trusted users only. Monitor vendor channels for updates regarding an official fix.
CVE-2026-40032: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') (CWE-78) in tclahr UAC
Description
UAC (Unix-like Artifacts Collector) before 3.3.0-rc1 contains a command injection vulnerability in the placeholder substitution and command execution pipeline where the _run_command() function passes constructed command strings directly to eval without proper sanitization. Attackers can inject shell metacharacters or command substitutions through attacker-controlled inputs including %line% values from foreach iterators and %user% / %user_home% values derived from system files to achieve arbitrary command execution with the privileges of the UAC process.
CVSS v4.0
Score 8.5high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-40032 is a command injection vulnerability in tclahr's UAC product prior to version 3.3.0-rc1. The issue arises because the _run_command() function passes constructed command strings directly to eval without proper input sanitization. Attacker-controlled inputs, including placeholder values like %line% from foreach iterators and %user% or %user_home% derived from system files, can be manipulated to inject shell metacharacters or command substitutions. This leads to arbitrary command execution under the privileges of the UAC process. The vulnerability is classified under CWE-78 (Improper Neutralization of Special Elements used in an OS Command).
Potential Impact
Successful exploitation allows an attacker to execute arbitrary OS commands with the privileges of the UAC process. This can lead to unauthorized system access, data compromise, or further system manipulation depending on the privileges of the UAC process. The CVSS 4.0 score of 8.5 reflects high impact due to the potential for high confidentiality, integrity, and availability damage.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch is currently documented. Until a patch is available, users should avoid running vulnerable versions or restrict access to the UAC process to trusted users only. Monitor vendor channels for updates regarding an official fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-04-08T13:36:53.761Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d6cdb91cc7ad14dab5bfaf
Added to database: 04/08/2026, 21:50:49 UTC
Last enriched: 06/24/2026, 15:10:27 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 116
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