CVE-2026-40032
HIGHUAC < 3.3.0-rc1 Command Injection via Placeholder Substitution
Title source: cnaDescription
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
Patch patch
Patch Commit #1
https://github.com/tclahr/uac/commit/cb95d7166cd47908e1189d9669e43f9a6d3d707f
Patch patch
Patch Commit #2
https://github.com/tclahr/uac/commit/50ace60e172e38feb78347bdf579311c23eff078
Patch patch
Patch Commit #3
https://github.com/tclahr/uac/commit/d0fca5e36d8d6a33a4404f0f6fe92b0424544589
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