Which versions of Uac are affected by EUVD-2026-20775?

CVE-2026-40032 is a critical command injection vulnerability in Unix-like Artifacts Collector (UAC) versions prior to 3.3.0-rc1 that allows local attackers to execute arbitrary commands at the UAC…. A patch is available.

How to fix or mitigate EUVD-2026-20775?

Within 24 hours: Identify all systems running UAC versions prior to 3.3.0-rc1 using inventory and endpoint tools. Within 7 days: Upgrade UAC to version 3.3.0-rc1 or later on all affected systems; test in non-production environment first. Within 30 days: Verify upgrade completion across the environment and document baseline configurations.

Uac EUVD-2026-20775

Q: What is the CVSS score of EUVD-2026-20775?

EUVD-2026-20775 has a CVSS 4.0 base score of 8.5 (High). CVSS vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

| CVE-2026-40032 HIGH

OS Command Injection (CWE-78)

2026-04-08 VulnCheck

GHSA-vv2j-m83f-q33j

Command Injection Uac

8.5

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

8.5 HIGH

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Scope

Lifecycle Timeline

EUVD ID Assigned

Apr 08, 2026 - 22:01 euvd

EUVD-2026-20775

Analysis Generated

Apr 08, 2026 - 22:01 vuln.today

Patch released

Apr 08, 2026 - 22:01 nvd

Patch available

CVE Published

Apr 08, 2026 - 21:35 nvd

HIGH 8.5

DescriptionCVE.org

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.

AnalysisAI

Command injection in Unix-like Artifacts Collector (UAC) pre-3.3.0-rc1 enables arbitrary code execution through unsanitized placeholder substitution in the _run_command() pipeline. Attackers inject shell metacharacters via %line%, %user%, or %user_home% placeholders processed by foreach iterators and system file parsers, exploiting direct eval() execution without input validation. Exploitation requires local access with user interaction but no authentication, executing commands at UAC process privilege level. No public exploit identified at time of analysis.

Technical ContextAI

Root cause is CWE-78 command injection in _run_command() function where placeholder values from foreach loop iterators and system file parsing undergo string substitution then pass unsanitized to eval(). Shell metacharacter filtering absent before command construction. Attack surface includes any UAC artifact collection workflow processing external file content or user-controlled iteration variables that populate %line%, %user%, %user_home% templates.

RemediationAI

Upgrade to UAC 3.3.0-rc1 or later incorporating upstream fixes that sanitize placeholder substitution inputs before eval() execution. Three security commits address the injection vector: cb95d7166cd47908e1189d9669e43f9a6d3d707f, 50ace60e172e38feb78347bdf579311c23eff078, and d0fca5e36d8d6a33a4404f0f6fe92b0424544589 available via GitHub PR 443. Until patching, restrict UAC execution to trusted artifact collection configurations excluding external file parsing or user-controlled foreach inputs. Validate and whitelist all placeholder sources. Vendor advisory and technical analysis: https://www.vulncheck.com/advisories/uac-rc1-command-injection-via-placeholder-substitution and https://github.com/tclahr/uac/issues/429