---
id: CVE-2026-89010
title: >-
  WAVLINK WN535M1 and WN535M3 routers running firmware prior to M35M1_V250922
  contain an unauthenticated OS command injection vulnerability that allows
  remote attackers to execute arbitrary commands as root by sending crafted
  filenames to …
summary: >-
  WAVLINK WN535M1 and WN535M3 routers running firmware prior to M35M1_V250922
  contain an unauthenticated OS command injection vulnerability that allows
  remote attackers to execute arbitrary commands as root by sending crafted
  filenames to …
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-78
vendor: WAVLINK Technology
product: WN535M1
affected:
  - WN535M1 M35M1_V210223
  - WN535M3 M35M1_V210223
published: '2026-09-11'
updated: '2026-09-11'
sourceUpdated: '2026-09-11T17:35:21.440'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89010'
references:
  - url: 'https://docs.wavlink.xyz/'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/camdsmith/wavlink-sync_server-rce/blob/main/README.md'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/wavlink-wn535m1-wn535m3-unauthenticated-os-command-injection-via-sync-server
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-11T16:15:46.679517Z'
ingestedAt: '2026-09-13T20:24:24.130Z'
epss: 0.03168
epssPercentile: 0.87477
---

## Overview

WAVLINK WN535M1 and WN535M3 routers running firmware prior to M35M1_V250922 contain an unauthenticated OS command injection vulnerability that allows remote attackers to execute arbitrary commands as root by sending crafted filenames to the sync_server daemon on TCP port 13136. The daemon interpolates attacker-controlled filename input containing shell metacharacters into a shell command string via sprintf() and passes it to system() without sanitization, enabling root-level command execution on the device.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.