Critical 9.8Published Sep 11, 2026

CVE-2026-89010WAVLINK WN535M1/WN535M3 Unauthenticated OS Command Injection via sync_server

Updated under an hour ago (2026-10-19 09:00 UTC)

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It affects WAVLINK Technology WN535M1 and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for WAVLINK Technology WN535M1

Exploited in the last 30 days

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: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Sep 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

WAVLINK Technology WN535M1 wavlink_technology:wn535m1 (from the name)	M35M1_V210223; M35M1_V250922 not affected	CNA record
WAVLINK Technology WN535M3 wavlink_technology:wn535m3 (from the name)	M35M1_V210223; M35M1_V250922 not affected	CNA record

References

https://github.com/camdsmith/wavlink-sync_server-rce/blob/main/README.mdtechnical-description, exploit
https://docs.wavlink.xyz/product, patch
https://www.vulncheck.com/advisories/wavlink-wn535m1-wn535m3-unauthenticated-os-command-injection-via-sync-serverthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.