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CRITICAL severity

CVE-2026-120279 — Pipiyyb

CRITICAL

CVE-2026-120279 is a critical-severity (CVSS 10) CWE-77 vulnerability. No vendor fix is recorded yet; mitigation options are listed below.

A flaw has been found in WAVLINK WN536AX6-A V260507. The affected element is an unknown function of the file /protocol.csp of the component openvpn_cli Handler. Executing a manipulation…

Published
Updated
Affected
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Patched
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Exploits
None indexed
Exploitation data as of Nov 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Description

A flaw has been found in WAVLINK WN536AX6-A V260507. The affected element is an unknown function of the file /protocol.csp of the component openvpn_cli Handler. Executing a manipulation of the argument file_id can lead to os command injection. The attack can be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure.

Detection & mitigation playbook

Vulnerability

  1. Detect

    Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

  2. Remediation status

    No fixed release is recorded for CVE-2026-120279 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.

  3. Mitigate without a patch

    Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does.

Frequently Asked Questions

A flaw has been found in WAVLINK WN536AX6-A V260507. The affected element is an unknown function of the file /protocol.csp of the component openvpn_cli Handler. Executing a manipulation of the argument file_id can lead to os command injection. The attack can be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure.
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CVE-2026-120279: Pipiyyb (Critical 10)