Firmware update for MES23XX, MES33XX, MES2328I, MES35XX, MES5324. Version 4.0.27.3

22 September 2026

Firmware update

Firmware version: 4.0.27.3

The firmware and detailed description of the product capabilities are available in the Downloads or on the product page.

Fixed

  • Fixed an error that caused the device to reboot when entering the show radius-servers status command;
  • Fixed an error that caused the backup switch in a stack to reboot when using the lldp optional-tlv 802.1 vlan-name command;
  • Fixed an error causing incorrect display of OSPF cost after a device reboot;
  • Fixed an error affecting PBR operation on a physical interface;
  • Fixed an error that caused repeated logging of the "Corrupted MAC on input" message;
  • Fixed an error causing incorrect display of fan status on the MES3324 rev.B;
  • Fixed an error that caused the device to reboot when deleting an SNMPv3 user while it was simultaneously being polled;
  • Fixed the erroneous appearance of an empty password in the line context.

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