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CVE-2026-15688— Password Authentication Bypass Vulnerability in GX Works3 and Motion Control Setting

Quick assessment

Affected
Mitsubishi Electric Corporation GX Works3
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

三菱电机 GX Works3 和 Motion Control Setting 中的身份验证算法实现不正确漏洞，允许本地攻击者通过执行受影响的产品并在内存中修改可执行模块的部分内容，即使使用无效的程序块密码也能成功完成身份验证，从而可能查看、篡改、破坏或删除控制程序。

CVSS 9.2 · Critical EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 2

VendorProduct Version RangeStatus
Mitsubishi Electric Corporation GX Works3 All versions affected
Mitsubishi Electric Corporation Motion Control Setting All versions affected
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I. Basic Information for CVE-2026-15688

Vulnerability Information
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Vulnerability Title
Password Authentication Bypass Vulnerability in GX Works3 and Motion Control Setting
Source: CVE Program / CVE List V5
Vulnerability Description
Incorrect Implementation of Authentication Algorithm Vulnerability in Mitsubishi Electric GX Works3 and Motion Control Setting allows a local attacker to successfully authenticate even with an invalid block password by executing the affected product and modifying part of the executable module in memory, and thereby may be able to view, tamper with, destroy, or delete control programs.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
认证算法的不正确实现
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mitsubishi Electric Corporation GX Works3 All versions -
Mitsubishi Electric Corporation Motion Control Setting All versions -

II. Public POCs for CVE-2026-15688

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-15688

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Vendor Advisories for CVE-2026-15688 (2)

IV. Related Vulnerabilities

Same product: GX Works3
Same vendor: Mitsubishi Electric Corporation
Same weakness: CWE-303

V. Comments for CVE-2026-15688

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