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Command InjectionWeakness · CWE-77

CVE-2026-18587

HIGH · 7.5 CVSS v3.1 Published 2026-08-03
No fix yet
No fix has been published. The vendor has not shipped a fixed release or patch. You remain exposed.
See remediation →
82/100
Remediation priority · High
Remotely reachable No privileges 2 weeks old

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A flaw has been found in Wavlink WL-NU516U1 708c073-mt7628. The impacted element is an unknown function of the component Config Import. Executing a manipulation of the argument Password can lead to os command injection. The attack may be launched remotely. This attack is characterized by high complexity. The exploitability is regarded as difficult. The exploit has been published and may be used. It is advisable to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-77

User input reaches a command interpreter without being fully separated from the command itself, so an attacker can append instructions of their own. Because those run with the application's privileges, it frequently means control of the host. The lasting fix is to avoid constructing commands from input — call APIs directly and pass arguments as data, never as concatenated strings.

General guidance for the command injection class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Recommended fix Moderate confidence

Contact Wavlink support or check wavlink.com for the specific fixed firmware version for WL-NU516U1

  1. 1. Identify the current firmware version of the Wavlink WL-NU516U1 device by accessing the web management interface or checking the device label
  2. 2. Visit the official Wavlink support site (wavlink.com) or contact Wavlink technical support to obtain the specific fixed firmware version for the WL-NU516U1 model
  3. 3. Download the latest firmware version from the official Wavlink support pages
  4. 4. Access the device administration panel and navigate to the firmware upgrade section
  5. 5. Upload and apply the new firmware version, following the manufacturer's upgrade instructions
  6. 6. After upgrade, verify the Config Import functionality works correctly and confirm the Password parameter is now properly sanitized

Generated from the published advisory — verify against the referenced sources before acting.

No vendor fix exists The vendor has not published a patch for this.

There is no version to upgrade to and no patch to apply. Every affected install stays exposed until the vendor ships a fix — or somebody else builds one.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-18587 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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