What is CVE-2026-89010?

CVE-2026-89010 is a critical-severity vulnerability in Wavlink Technology Wn535m1, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-09-11.

How severe is CVE-2026-89010?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Wavlink Technology Wn535m1

CVE-2026-89010

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.

Vulnerability class: Command Injection (OS Command Injection)

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Wavlink Technology Wn535m1 — versions M35M1_V210223
Wavlink Technology Wn535m3 — versions M35M1_V210223

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (product, patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-89010?: CVE-2026-89010 is a critical-severity vulnerability in Wavlink Technology Wn535m1, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-09-11.
How severe is CVE-2026-89010?: Critical severity. CVSS v3 base score is 9.8 out of 10.