CVE intelligence and bounded remediation

CVE-2023-34644 — Ruijie Rg-Ew1200R Firmware security vulnerability

Critical CVSS 9.8

Remote code execution vulnerability in Ruijie Networks Product: RG-EW series home routers and repeaters EW_3.0(1)B11P204, RG-NBS and RG-S1930 series switches SWITCH_3.0(1)B11P218, RG-EG series business VPN routers EG_3.0(1)B11P216, EAP and RAP series wireless access points AP_3.0(1)B11P218, NBC series wireless controllers AC_3.0(1)B11P86 allows unauthorized remote attackers to gain the highest privileges via crafted POST request to /cgi-bin/luci/api/auth.

Severity
Critical
CVSS
9.8 (3.1)
Published
2023-07-31
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-94

Affected products

  • ruijie / rg-ew1200r_firmware / 3.0(1)b11p204
  • ruijie / rg-ew300_firmware / 3.0(1)b11p204
  • ruijie / rg-ew3200gx_firmware / 3.0(1)b11p204
  • ruijie / rg-ew1200g_firmware / 3.0(1)b11p204
  • ruijie / rg-ew1800gx_firmware / 3.0(1)b11p204
  • ruijie / rg-ew300r_firmware / 3.0(1)b11p204

Showing 6 representative product identities from 65 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

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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