Wn535m3 CVEs and Security Vulnerabilities

CVE-2026-89010

WAVLINK WN535M1/WN535M3 Unauthenticated OS Command Injection via sync_server

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.

CVSS 4.0 · 9.3 Critical EPSS 3.2% KEV · Not listed

Vendors

Wavlink

Products

Wn535m1 Wn535m3

CVE-2026-89009

WAVLINK WN535M1/WN535M3 Unauthenticated Arbitrary File Write via sync_server

WAVLINK WN535M1 and WN535M3 routers running firmware prior to M35M1_V250922 contain an unauthenticated arbitrary file write vulnerability that allows remote attackers to overwrite any file on the device by sending a crafted payload to the sync_server daemon on TCP port 13136. The daemon, which runs as root and requires no authentication, accepts a 100-byte filename field in its protocol header without path canonicalization, allowing attackers to supply an absolute path and write arbitrary content to overwrite startup scripts or credential stores to achieve persistent system compromise.

CVSS 4.0 · 8.8 High EPSS 1.0% KEV · Not listed