CVE intelligence and bounded remediation

CVE-2026-8227 — A weakness has been identified in Wavlink NU516U1 240425

High CVSS 8.8

A weakness has been identified in Wavlink NU516U1 240425. This issue affects the function wzdapMesh of the file /cgi-bin/adm.cgi. This manipulation causes os command injection. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure.

Severity
High
CVSS
8.8 (3.1)
Published
2026-05-10
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-77, CWE-78

Affected products

  • wavlink / wl-nu516u1_firmware / m16u1_v240425

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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