CVE intelligence and bounded remediation

CVE-2025-56091 — Ruijie Rg-Ew1800Gx Firmware security vulnerability

High CVSS 8.8

OS Command Injection vulnerability in Ruijie RG-EW1800GX B11P226_EW1800GX_10223121 allowing attackers to execute arbitrary commands via a crafted POST request to the module_set in file /usr/local/lua/dev_config/config_retain.lua.

Severity
High
CVSS
8.8 (3.1)
Published
2025-12-11
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-78

Affected products

  • ruijie / rg-ew1800gx_firmware / 3.0(1)b11p226
  • ruijie / rg-ew300r_firmware / 3.0(1)b11p301

Matched remediation archetype

Command, code, expression, and template injection

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Check exposure

  • Trace untrusted values to process execution, interpreters, evaluators, template engines, dynamic imports, and administrative scripting features.
  • Determine whether the affected path is reachable across each trust boundary and which service account or host privilege it inherits.
  • Review configuration for optional execution features, unsafe compatibility modes, and shell invocation.

Remediate safely

  • Replace string-built commands or evaluated code with fixed operations and structured argument APIs that do not invoke a shell.
  • Use strict allowlists for operation identifiers and reject unexpected input before it reaches any interpreter.
  • Update the affected component and add inert regression tests covering metacharacters, encoding variants, and alternate request paths.

Authoritative sources

Complete CVE record and remediation plan

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