CVE-2026-40032

HIGH

UAC < 3.3.0-rc1 Command Injection via Placeholder Substitution

Title source: cna
STIX 2.1

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.

References (7)

Core 7
Core References
Third Party Advisory third-party-advisory
VulnCheck Advisory: UAC < 3.3.0-rc1 Command Injection via Placeholder Substitution
https://www.vulncheck.com/advisories/uac-rc1-command-injection-via-placeholder-substitution
Product product
Pull Request
https://github.com/tclahr/uac/pull/443
Product product
Related Issue
https://github.com/tclahr/uac/issues/429
Vendor Advisory vendor-advisory
Mobasi Sentinel Vulnerability Index
https://mobasi.ai/sentinel

Scores

CVSS v3 7.8
EPSS 0.0073
EPSS Percentile 49.1%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-78
Status published
Products (3)
tclahr/UAC < 3.2.0
tclahr/UAC < 3.3.0-rc1
tclahr/UAC 3.3.0-rc1
Published Apr 08, 2026
Tracked Since Apr 09, 2026