Technical Advisory: Flash Write Cycle Issue in Xerus 4.0.0 through 4.3.12

Flash Write Cycle Issue in Xerus 4.0.0 through 4.3.12 (2/20/2026)

We have identified a critical issue in Xerus Firmware v4.0.0 through v4.3.12, in which flash write operations occur more frequently than expected under certain conditions. Because each flash memory cell has a limited number of program/erase cycles, excessive writes can accelerate wear and may lead to long-term reliability and performance issues.

NOTE: This issue does not affect the PDU’s outlet power state.

Affected Product(s):

  • Raritan PX2/PXC/PXO Rack PDUs with firmware revision v4.0.0 through v4.3.12
  • Raritan PX3 Rack PDUs with firmware revision v4.0.0 through v4.3.12
  • Raritan PX3 Inline Meters with firmware revision v4.0.0 through v4.3.12
  • Raritan PX3TS Rack Transfer Switches with firmware revision v4.0.0 through v4.3.12
  • Raritan PX4 Rack PDUs with firmware revision v4.0.0 through v4.3.12
  • Raritan PX4 Inline Meters with firmware revision v4.0.0 through v4.3.12
  • Raritan SRC Smart Rack Controllers with firmware revision v4.0.0 through v4.3.12
  • Raritan BCM2 Branch Circuit Monitoring System with firmware revision v4.0.0 through v4.3.12
  • Legrand LP Rack PDUs with firmware revisions v4.0.0 through v4.3.12

 

To address this issue, an upgrade to Xerus Firmware v4.3.13 or later is required to reduce flash write cycles and mitigate this potential issue. Please prioritize this firmware upgrade in your operations.

 

Read more here to understand the root cause.

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