CVE-2026-40456

Authenticated command execution via unvalidated throughput IP

Published Jun 18, 2026 · Updated Jun 18, 2026

OS command injection in LMS before commit 9fcb4de allows remote authenticated users to execute arbitrary commands through a crafted IP address. The getThroughput functions in modules/netdevxajax.inc.php and modules/nodexajax.inc.php substitute the unvalidated address into the configured live-traffic helper command and pass the resulting string to exec(). Exploitation requires adjacent-network access, a low-privileged LMS session, and an enabled live-traffic helper; commands run with the web server process's privileges.

CVSS severity8.6
High
EPSS probability0.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

OS command injection in LMS before commit 9fcb4de allows remote authenticated users to execute arbitrary commands through a crafted IP address. The getThroughput functions in modules/netdevxajax.inc.php and modules/nodexajax.inc.php substitute the unvalidated address into the configured live-traffic helper command and pass the resulting string to exec(). Exploitation requires adjacent-network access, a low-privileged LMS session, and an enabled live-traffic helper; commands run with the web server process's privileges.

The record

CVE
CVE-2026-40456
Published
Jun 18, 2026
Updated
Jun 18, 2026
Vendor
LMS Community
Product
LMS
Classifications
CWE-78, T1059
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <9fcb4de

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

LMS Community · LMSversion=0 <9fcb4de

Published CVSS scores

8.6CERT.PLCVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo