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 ↗

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

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

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