CVE-2026-39544 themeStek CVE debrief

Who should care

Users of LabtechCO themeStek LabtechCO up to version 8.3 should assess and mitigate this HIGH severity vulnerability to prevent potential PHP Local File Inclusion attacks.

Technical summary

CVE-2026-39544 is a PHP Remote File Inclusion vulnerability in themeStek LabtechCO labtechco, allowing PHP Local File Inclusion. The issue affects LabtechCO from n/a through <= 8.3. The vulnerability has a CVSS score of 7.5 and a CVSS severity of HIGH.

Defensive priority

Given the HIGH severity and potential for Local File Inclusion attacks, prioritize vulnerability assessment and mitigation for LabtechCO themeStek LabtechCO versions up to 8.3 with immediate attention to system owners and security teams responsible for these systems. Implement compensating controls such as web application firewalls to detect and prevent potential Local File Inclusion attacks, and monitor system logs for suspicious file inclusion attempts.

Recommended defensive actions

• Assess LabtechCO themeStek LabtechCO version and check for updates to version 8.3 or later.
• Implement compensating controls such as web application firewalls to detect and prevent potential Local File Inclusion attacks.
• Monitor system logs for suspicious file inclusion attempts.
• Consider applying patches or updates provided by the vendor, if available.

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further investigation and verification are necessary to fully understand the scope and impact of CVE-2026-39544. Evidence from the CVE record and NVD entry should be carefully reviewed, and additional research may be required to confirm affected systems and potential attack vectors.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.