CVE-2026-40032
Command Injection in UAC Before 3.3.0-rc1 Enables Arbitrary Execution
Publication date: 2026-04-08
Last updated on: 2026-04-08
Assigner: VulnCheck
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| tclahr | uac | to 3.3.0-rc1 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-78 | The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in UAC (Unix-like Artifacts Collector) versions before 3.3.0-rc1. It is a command injection flaw in the placeholder substitution and command execution pipeline. Specifically, the _run_command() function passes constructed command strings directly to eval without proper sanitization. Attackers can exploit this by injecting shell metacharacters or command substitutions through inputs they control, such as %line% values from foreach iterators and %user% or %user_home% values derived from system files. This allows arbitrary command execution with the privileges of the UAC process.
How can this vulnerability impact me? :
The vulnerability allows attackers to execute arbitrary commands on the affected system with the privileges of the UAC process. This can lead to unauthorized access, data manipulation, system compromise, and potentially full control over the affected system depending on the privileges of the UAC process.