CVE intelligence and bounded remediation

CVE-2021-39280 — Certain Korenix JetWave devices allow authenticated users to execute arbitrary code as root via /syscmd.asp

High CVSS 9

Certain Korenix JetWave devices allow authenticated users to execute arbitrary code as root via /syscmd.asp. This affects 2212X before 1.9.1, 2212S before 1.9.1, 2212G before 1.8, 3220 V3 before 1.5.1, 3420 V3 before 1.5.1, and 2311 through 2022-01-31.

Severity
High
CVSS
9 (2.0)
Published
2022-02-06
CISA KEV
Not currently listed
Ecosystem
operating-system

Affected products

  • korenix / jetwave_2212s_firmware
  • korenix / jetwave_2212g_firmware
  • korenix / jetwave_2311_firmware
  • korenix / jetwave_3220_firmware
  • korenix / jetwave_3420_firmware
  • korenix / jetwave_2212x_firmware

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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