Screen Creator Advance2, HMI GC-A2 series, and Real time remote monitoring and control tool Screen Creator Advance2 versions prior to Ver.0.1.1.3 Build01, HMI GC-A2 series(GC-A22W-CW, GC-A24W-C(W), GC-A26W-C(W), GC-A24, GC-A24-M, GC-A25, GC-A26, and GC-A26-J2), and Real time remote monitoring and control tool(Remote GC) allows a local attacker to bypass authentication due to the improper check for the Remote control setting's account names. This may allow attacker who can access the HMI from Real time remote monitoring and control tool may perform arbitrary operations on the HMI. As a result, the information stored in the HMI may be disclosed, deleted or altered, and/or the equipment may be illegally operated via the HMI.

Buffer overflow in the ECOM Ethernet module in Koyo H0-ECOM, H0-ECOM100, H2-ECOM, H2-ECOM-F, H2-ECOM100, H4-ECOM, H4-ECOM-F, and H4-ECOM100 allows remote attackers to execute arbitrary code via long strings in unspecified parameters.

The ECOM Ethernet module in Koyo H0-ECOM, H0-ECOM100, H2-ECOM, H2-ECOM-F, H2-ECOM100, H4-ECOM, H4-ECOM-F, and H4-ECOM100 supports a maximum password length of 8 bytes, which makes it easier for remote attackers to obtain access via a brute-force attack.

The web server in the ECOM Ethernet module in Koyo H0-ECOM, H0-ECOM100, H2-ECOM, H2-ECOM-F, H2-ECOM100, H4-ECOM, H4-ECOM-F, and H4-ECOM100 does not require authentication, which allows remote attackers to perform unspecified functions via unknown vectors.

The web server in the ECOM Ethernet module in Koyo H0-ECOM, H0-ECOM100, H2-ECOM, H2-ECOM-F, H2-ECOM100, H4-ECOM, H4-ECOM-F, and H4-ECOM100 allows remote attackers to cause a denial of service (resource consumption) via unspecified vectors.

Cross-site scripting (XSS) vulnerability in the web server in the ECOM Ethernet module in Koyo H0-ECOM, H0-ECOM100, H2-ECOM, H2-ECOM-F, H2-ECOM100, H4-ECOM, H4-ECOM-F, and H4-ECOM100 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.