High 8.6Published Jun 18, 2026

CVE-2026-40456OS Command Injection in LMS

Updated under an hour ago (Oct 27, 2026, 1:00 PM ET)

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It affects LMS. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 8.6 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: CERT-PL
NVD analysis: Deferred
Record last updated: Jun 18, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

LMS LMS lms:lms (from the name)	before 9fcb4de	CNA record

References

References

https://github.com/chilek/lms/commit/9fcb4de19b7d76394898dbc124252b86b07ac0ed	patch
https://cert.pl/posts/2026/06/CVE-2026-40455	third-party-advisory
https://lms.org.pl/	product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.