CVE-2026-15688
highpriority · track · 0EPSS 0.002 · 7 %ileUSEPSS · scored 2026-10-28
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.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
No vendor fix yet; a mitigation is available.
- MitigationMitsubishi Electric GX Works3cisa_csaf_ot
For customers of the affected products, Mitsubishi Electric recommends installing antivirus software on a computer running the affected product, to minimize the risk of exploiting this vulnerability.
- MitigationMitsubishi Electric Motion Control Settings (Software packaged with GX Works3)cisa_csaf_ot
For customers of the affected products, Mitsubishi Electric recommends installing antivirus software on a computer running the affected product, to minimize the risk of exploiting this vulnerability.
- WorkaroundMitsubishi Electric GX Works3cisa_csaf_ot
For customers using GX Works3, please download version 1.096A or later from the link https://www.mitsubishielectric.com/fa/download/software/detailsearch.page?mode=software&kisyu=/plceng&shiryoid=1000001411&lang=2&select=0&softid=1&infostatus=1_2_1&viewradio=0&viewstatus=&viewpos=, install it, and set the security version for projects to "2". Please refer to “15.9 Preventing Illegal Access to/Falsification of Data (Security Version)” in “GX Works3 Operating Manual” for details. For more information about the workaround, refer to the Mitsubishi Electric security advisory available at "https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2026-007_en.pdf".
https://www.mitsubishielectric.com/fa/download/software/detailsearch.page?mode=software&kisyu=/plceng&shiryoid=1000001411&lang=2&select=0&softid=1&infostatus=1_2_1&viewradio=0&viewstatus=&viewpos= - WorkaroundMitsubishi Electric Motion Control Settings (Software packaged with GX Works3)cisa_csaf_ot
For customers using Motion Control Settings (Software packaged with GX Works3), Please download version 1.070Y or later from the link "https://www.mitsubishielectric.com/fa/download/software/detailsearch.page?mode=software&kisyu=/ssc&shiryoid=1000000803&lang=2&select=0&softid=1&infostatus=1_8_1&viewradio=0&viewstatus=&viewpos=", install it, and set the security version for projects to "2". Please refer to “12.5 Preventing Illegal Access to/Falsification of Data (Security Version)” in “Motion Control Setting Function Help” for details. For more information about the workaround, refer to the Mitsubishi Electric security advisory at "https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2026-007_en.pdf".
https://www.mitsubishielectric.com/fa/download/software/detailsearch.page?mode=software&kisyu=/ssc&shiryoid=1000000803&lang=2&select=0&softid=1&infostatus=1_8_1&viewradio=0&viewstatus=&viewpos=
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.2–9.2
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (4)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- ICSA-26-260-02Mitsubishi Electric GX Works3 and Motion Control Settings2026-09-17icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability could allow a local attacker to successfully authenticate even with an invalid block password by executing the affected product and modify part of the executable module in memory, and thereby allows the attacker to view, tamper with, destroy, or delete control programs.
sources
Which sources assert this record, and when.
references (3) nvd
External citations — patches, advisories, analysis.
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