OS Command Injection Vulnerability in LAN Management System by LMS
CVE-2026-40456

8.6HIGH

Key Information:

Vendor

Lms

Status
Lms
Vendor
CVE Published:
18 June 2026

What is CVE-2026-40456?

An OS Command Injection vulnerability is present in the LAN Management System prior to commit 9fcb4de, resulting from inadequate validation of an IP address parameter being sent to the exec() function. This flaw allows attackers to exploit the system by executing arbitrary operating system commands, potentially compromising the system’s integrity and confidentiality.

Affected Version(s)

LMS 0 < 9fcb4de

References

https://github.com/chilek/lms/commit/9fcb4de19b7d76394898...
patch
https://cert.pl/posts/2026/06/CVE-2026-40455
third-party-advisory
https://lms.org.pl/
product

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Tymoteusz Dominik
.