CVE-2026-40456

OS Command Injection in LMS

State: Published
Severity: 8.6 High
Published: Jun 18, 2026
Updated: Jun 18, 2026
Reserved: Apr 13, 2026

Description

An OS Command Injection vulnerability exists in LMS (LAN Management System) before commit 9fcb4de due to an IP address parameter being passed to the "exec()" function without proper validation, allowing attackers to execute arbitrary operating system commands.

Scores

CVSS	Score	Vector	Source
4.0	8.6 High	CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N	CERT-PL

Weaknesses

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Affected Products

Product	Versions
LMSLMS	before 9fcb4deAffected

References

https://github.com/chilek/lms/commit/9fcb4de19b7d76394898dbc124252b86b07ac0edpatch
https://cert.pl/posts/2026/06/CVE-2026-40455third-party-advisory
https://lms.org.pl/product

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