CVE-2021-20592: Mitsubishielectric GOT2000 GT23 Firmware

High severity, CVSS 7.5. EPSS: 1.5% chance of exploitation in the next 30 days.

Missing synchronization vulnerability in GOT2000 series GT27 model communication driver versions 01.19.000 through 01.39.010, GT25 model communication driver versions 01.19.000 through 01.39.010 and GT23 model communication driver versions 01.19.000 through 01.39.010 and GT SoftGOT2000 versions 1.170C through 1.256S allows a remote unauthenticated attacker to cause DoS condition on the MODBUS/TCP slave communication function of the products by rapidly and repeatedly connecting and disconnecting to and from the MODBUS/TCP communication port on a target. Restart or reset is required to recover.

Affected products

• Mitsubishielectric GOT2000 GT23 Firmware: from 01.19.000, up to and including 01.39.010
• Mitsubishielectric GOT2000 GT25 Firmware: from 01.19.000, up to and including 01.39.010
• Mitsubishielectric GOT2000 GT27 Firmware: from 01.19.000, up to and including 01.39.010
• Mitsubishielectric Gt SOFTGOT2000: from 1.170c, up to and including 1.256s

Published 2021-08-05. Last modified 2026-06-17.