CVE-2026-89010
WAVLINK WN535M1/WN535M3 Unauthenticated OS Command Injection via sync_server
- State
- Published
- Severity
- 9.3 Critical
- Published
- Sep 11, 2026
- Updated
- Oct 29, 2026
- Reserved
- Sep 10, 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | 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 | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Products
| Product | Versions |
|---|---|
WN535M1WAVLINK Technology |
|
WN535M3WAVLINK Technology |
|
References
- Researcher Disclosuretechnical-descriptionexploit
- WAVLINK Advisorypatchvendor-advisory
- https://www.vulncheck.com/advisories/wavlink-wn535m1-wn535m3-unauthenticated-os-command-injection-via-sync-serverthird-party-advisory
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