# CVE-2026-89010

## Summary

- **CVE ID:** CVE-2026-89010
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-78
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 11, 2026

## Description

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.

## Affected Products

- WAVLINK Technology — WN535M1 (M35M1_V210223)
- WAVLINK Technology — WN535M1 (M35M1_V250922)
- WAVLINK Technology — WN535M3 (M35M1_V210223)
- WAVLINK Technology — WN535M3 (M35M1_V250922)

## References

- [CNA](https://github.com/camdsmith/wavlink-sync_server-rce/blob/main/README.md)
- [CNA](https://docs.wavlink.xyz/)
- [CNA](https://www.vulncheck.com/advisories/wavlink-wn535m1-wn535m3-unauthenticated-os-command-injection-via-sync-server)

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._