by Kastro
Paper/Archive/CVE-2026-89010

CVE-2026-89010

WAVLINK Technology WN535M1 — WAVLINK WN535M1/WN535M3 Unauthenticated OS Command Injection via sync_server

EPSS 3%public exploitCVSS 9.8
critical.is priorityof 100
57
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 88.0.880 × 2017.6Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
WN535M1M35M1_V210223–CNA
WN535M3M35M1_V210223–CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/camdsmith/wavlink-sync_server-rce/blob/main/README.mdpatchdocs.wavlink.xyz/Security_Advisory/WAVLINK-SA-2026-091302writeupvulncheck.com/advisories/wavlink-wn535m1-wn535m3-unauthenticated-os-command-injection-via-sync-server