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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.032 (87.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.032 · newest: 0.032 · change: 0.000
Affected products
- Wavlink Technology Wn535m1 — versions M35M1_V210223
- Wavlink Technology Wn535m3 — versions M35M1_V210223
Weakness classification (CWE)
References
- github.com/camdsmith/wavlink-sync_server-rce/blob/main/README.md (technical-description, exploit)
- docs.wavlink.xyz/ (product, patch)
- www.vulncheck.com/advisories/wavlink-wn535m1-wn535m3-unauthenticated-os-command… (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.