CVE-2026-89010

CVSS 9.8 (critical) · published 2026-09-11

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.

Weakness: CWE-78

Source: NVD CVE-2026-89010

References

• https://docs.wavlink.xyz/Security_Advisory/WAVLINK-SA-2026-091302/
• https://github.com/camdsmith/wavlink-sync_server-rce/blob/main/README.md
• https://www.vulncheck.com/advisories/wavlink-wn535m1-wn535m3-unauthenticated-os-command-injection-via-sync-server

Check your software

Connect an AI agent to the FixLane MCP server or ask the Telegram bot to check what you have installed against incidents with a verified fixed version.