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PatchSiren cyber security CVE debrief

CVE-2026-40740 Themeum CVE debrief

A Missing Authorization vulnerability in Themeum Tutor LMS tutor allows Exploiting Incorrectly Configured Access Control Security Levels. This issue affects Tutor LMS: from n/a through <= 3.9.7. The vulnerability is described as a Missing Authorization issue, which can lead to potential security risks. Defenders should be aware of this vulnerability and take necessary actions to prevent potential security risks. The CVE record and NVD entry provide details on the vulnerability, but additional information on exploitation or impact is limited. The issue is considered a Medium severity vulnerability with a CVSS score of 5.4.

Vendor
Themeum
Product
Tutor LMS
CVSS
MEDIUM 5.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-15
Original CVE updated
2026-10-26
Advisory published
2026-04-15
Advisory updated
2026-10-26

Who should care

Defenders responsible for Tutor LMS installations, security teams, and administrators should be aware of this vulnerability and take necessary actions to prevent potential security risks.

Why it matters

Defenders should prioritize verifying and updating Tutor LMS installations to prevent potential security risks associated with the missing authorization vulnerability.

  • Potential security risks due to missing authorization in Tutor LMS.
  • Possible exploitation of incorrectly configured access control security levels.
  • Need for verification and updates to prevent security incidents.

Technical summary

The CVE record describes a Missing Authorization vulnerability in Themeum Tutor LMS tutor, which allows Exploiting Incorrectly Configured Access Control Security Levels. The issue affects Tutor LMS from n/a through <= 3.9.7. The vulnerability is considered a Medium severity vulnerability with a CVSS score of 5.4. Defenders should prioritize verifying and updating Tutor LMS installations to prevent potential security risks associated with the missing authorization vulnerability.

Defensive priority

Defenders should prioritize verifying and updating Tutor LMS installations to prevent potential security risks.

Recommended defensive actions

  • Verify Tutor LMS installations and update to a version beyond 3.9.7 if possible.
  • Review and adjust access control configurations for Tutor LMS to prevent exploitation.
  • Monitor for potential security incidents related to this vulnerability.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional information on exploitation or impact is limited. There is no information on known or reported exploitation of this vulnerability. Defenders should verify and update Tutor LMS installations to prevent potential security risks. The vulnerability affects Tutor LMS from n/a through <= 3.9.7. The CVE record was published on 2026-04-15T11:16:36.177Z and has not been modified since then. The NVD entry provides

Sources and references

Verified primary and authoritative sources

  • CVE-2026-40740 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-40740

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-40740 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-40740

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

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.