CVE-2026-89010 WAVLINK WN535M1/WN535M3 Unauthenticated OS Command Injection via sync_server
Remote attackers can execute arbitrary root commands on WAVLINK routers via unauthenticated OS command injection in the sync_server daemon.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-89010?
CVE-2026-89010 is a critical command injection vulnerability in WAVLINK Technology WN535M1, published on 11 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-78
Which versions are affected by CVE-2026-89010?
How do I fix CVE-2026-89010?
No fix has been published for CVE-2026-89010 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-89010 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-89010 exists.
Sources
Also known as GHSA-22gq-jjvp-2jc9.