CVE-2025-56752: Ruijie Rg-ES205GC-P Firmware

Critical severity, CVSS 9.4. EPSS: 0.5% chance of exploitation in the next 30 days.

A vulnerability in the Ruijie RG-ES series switch firmware ESW_1.0(1)B1P39 enables remote attackers to fully bypass authentication mechanisms, providing them with unrestricted access to alter administrative settings and potentially seize control of affected devices via crafted HTTP POST request to /user.cgi.

Affected products

  • Ruijie Rg-ES205GC-P Firmware: version esw_1.0(1)b1p27 only; version esw_1.0(1)b1p35 only; version esw_1.0(1)b1p39 only
  • Ruijie Rg-ES205GC Firmware: version esw_1.0(1)b1p27 only; version esw_1.0(1)b1p35 only; version esw_1.0(1)b1p39 only
  • Ruijie Rg-ES206GC-P Firmware: version esw_1.0(1)b1p27 only; version esw_1.0(1)b1p35 only
  • Ruijie Rg-ES206GS-P Firmware: version esw_1.0(1)b1p27 only; version esw_1.0(1)b1p35 only; version esw_1.0(1)b1p39 only
  • Ruijie Rg-ES206MG-P Firmware: version esw_1.0(1)b1p42_release(12142711) only
  • Ruijie Rg-ES208GC Firmware: version esw_1.0(1)b1p27 only; version esw_1.0(1)b1p35 only; version esw_1.0(1)b1p39 only
  • Ruijie Rg-ES209GC-P Firmware: version esw_1.0(1)b1p27 only; version esw_1.0(1)b1p35 only; version esw_1.0(1)b1p39 only
  • Ruijie Rg-ES209MG-P Firmware: version esw_1.0(1)b1p42_release(12142711) only
  • Ruijie Rg-ES210GC-Lp Firmware: version esw_1.0(1)b1p27 only
  • Ruijie Rg-ES210GS-P Firmware: version esw_1.0(1)b1p27 only; version esw_1.0(1)b1p35 only; version esw_1.0(1)b1p39 only
  • Ruijie Rg-ES216GC-v2 Firmware: version esw_1.0(1)b1p27 only; version esw_1.0(1)b1p35 only; version esw_1.0(1)b1p39 only
  • Ruijie Rg-ES216GC Firmware: version esw_1.0(1)b1p27 only
  • Ruijie Rg-ES218GC-P Firmware: version esw_1.0(1)b1p27 only; version esw_1.0(1)b1p35 only
  • Ruijie Rg-ES220GS-P Firmware: version esw_1.0(1)b1p27 only; version esw_1.0(1)b1p35 only; version esw_1.0(1)b1p39 only
  • Ruijie Rg-ES224GC-v2 Firmware: version esw_1.0(1)b1p27 only; version esw_1.0(1)b1p35 only; version esw_1.0(1)b1p39 only
  • Ruijie Rg-ES224GC Firmware: version esw_1.0(1)b1p27 only
  • Ruijie Rg-ES226GC-P Firmware: version esw_1.0(1)b1p27 only; version esw_1.0(1)b1p35 only
  • Ruijie Rg-ES228GS-P Firmware: version esw_1.0(1)b1p27 only; version esw_1.0(1)b1p35 only; version esw_1.0(1)b1p39 only
  • Ruijie Rg-NIS2100-4gt2sfp-HP Firmware: version esw_1.0(1)b1p39 only
  • Ruijie Rg-NIS2100-8gt2sfp-HP Firmware: version esw_1.0(1)b1p39 only

Published 2025-09-03. Last modified 2026-06-17.