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CVE-2026-40032— UAC < 3.3.0-rc1 Command Injection via Placeholder Substitution

Quick assessment

Affected
tclahr UAC
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

uac是Thiago Canozzo Lahr个人开发者的一个Unix系统取证与事件响应工具。 UAC 3.3.0-rc1之前版本存在操作系统命令注入漏洞，该漏洞源于_run_command()函数将构建的命令字符串直接传递给eval而未进行适当清理，可能导致通过攻击者控制的输入注入shell元字符或命令替换，从而执行任意命令。

CVSS 7.8 · High EPSS 1.18% · P67

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
tclahr UAC < 3.3.0-rc1 affected
3.3.0-rc1 unaffected
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I. Basic Information for CVE-2026-40032

Vulnerability Information
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Vulnerability Title
UAC < 3.3.0-rc1 Command Injection via Placeholder Substitution
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
uac 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
uac是Thiago Canozzo Lahr个人开发者的一个Unix系统取证与事件响应工具。 UAC 3.3.0-rc1之前版本存在操作系统命令注入漏洞，该漏洞源于_run_command()函数将构建的命令字符串直接传递给eval而未进行适当清理，可能导致通过攻击者控制的输入注入shell元字符或命令替换，从而执行任意命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
tclahr UAC 0 ~ 3.3.0-rc1 -

II. Public POCs for CVE-2026-40032

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III. Intelligence Information for CVE-2026-40032

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Patches & Fixes for CVE-2026-40032 (3)

Vendor Pages for CVE-2026-40032 (1)

IV. Related Vulnerabilities

Same product: UAC
Same vendor: tclahr
Same weakness: CWE-78

V. Comments for CVE-2026-40032

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