---
title: "CVE-2026-15688: Mitsubishi Electric GX Works3 & Motion Control Setting - Authentication Bypass"
description: "Mitsubishi Electric GX Works3 and Motion Control Setting contain an authentication bypass caused by incorrect implementation of the authentication algorithm, letting local attackers authenticate with invalid passwords and manipulate control programs, exploit requires local access and executable modification."
url: https://panop.io/threat-heartbeat/CVE-2026-15688/
---

# CVE-2026-15688 Mitsubishi Electric GX Works3 & Motion Control Setting - Authentication Bypass

Mitsubishi Electric GX Works3 and Motion Control Setting contain an authentication bypass caused by incorrect implementation of the authentication algorithm, letting local attackers authenticate with invalid passwords and manipulate control programs, exploit requires local access and executable modification.

CVSS base score 9.2 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.13% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-15688)

## Details

Type

Authentication Bypass

Impact

Broken Authentication, Data Tampering

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

17 September 2026

Updated

15 October 2026

Weakness

[CWE-303](https://cwe.mitre.org/data/definitions/303.html)

## Vendor fix

Update to the latest version with fixed authentication implementation.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-15688](https://nvd.nist.gov/vuln/detail/CVE-2026-15688)
- [https://jvn.jp/vu/JVNVU99700314](https://jvn.jp/vu/JVNVU99700314)
- [https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2026-007\_en.pdf](https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2026-007_en.pdf)
- [https://www.cisa.gov/news-events/ics-advisories/icsa-26-260-02](https://www.cisa.gov/news-events/ics-advisories/icsa-26-260-02)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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