CVE-2026-15688 Mitsubishi Electric Corporation CVE debrief

Who should care

Defenders responsible for Mitsubishi Electric GX Works3 and Motion Control Setting installations should assess exposure and prioritize remediation. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify and remediate this vulnerability to prevent potential unauthorized access and tampering with control programs.

Why it matters

Defenders should prioritize verifying and remediating this vulnerability in Mitsubishi Electric GX Works3 and Motion Control Setting installations to prevent potential unauthorized access and tampering with control programs.

• Potential unauthorized access to control programs.
• Possible tampering or deletion of control programs.
• Need for verification of affected versions and remediation status.

Technical summary

The vulnerability allows a local attacker to authenticate with an invalid block password by modifying the executable module in memory, potentially allowing them to view, tamper with, destroy, or delete control programs. This Incorrect Implementation of Authentication Algorithm Vulnerability in Mitsubishi Electric GX Works3 and Motion Control Setting requires immediate attention from defenders to prevent potential unauthorized access and tampering with control programs. The vulnerability's impact on control programs and the potential for local attackers to exploit it make it critical for defenders to assess exposure and prioritize remediation.

Defensive priority

Defenders should prioritize verifying and remediating this vulnerability in Mitsubishi Electric GX Works3 and Motion Control Setting installations.

Recommended defensive actions

• Verify and remediate this vulnerability in Mitsubishi Electric GX Works3 and Motion Control Setting installations.
• Review and update control programs to prevent potential tampering or deletion.
• Implement additional authentication and authorization measures to prevent local attacks.
• Conduct a thorough review of affected product deployments in managed environments.
• Assign an owner for follow-up on remediation efforts.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record and NVD entry provide details on the Incorrect Implementation of Authentication Algorithm Vulnerability. The vulnerability allows a local attacker to authenticate with an invalid block password by modifying the executable module in memory, potentially allowing them to view, tamper with, destroy, or delete control programs. Defenders should verify and remediate this vulnerability in Mitsubishi Electric GX Works3 and Motion Control Setting installations to prevent potential unauthorized access and tampering with control

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.