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CVE-2026-89010 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://docs.wavlink.xyz/	[email protected]	Vendor
https://github.com/camdsmith/wavlink-sync_server-rce/blob/main/README.md	[email protected]	ExploitRemedy
https://www.vulncheck.com/advisories/wavlink-wn535m1-wn535m3-unauthenticated-os-command-injection-via-sync-server	[email protected]	Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-78	Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')	[email protected]

Affected Products

Product	Versions
WAVLINK WN535M1	<= M35M1_V210223
CPE No CPEs found in CPE dictionary for this product. Remediation Workaround:low effort Disable Mesh Mode to stop the sync_server from binding to TCP port 13136. Mitigation:low effort Block inbound TCP port 13136 at the network boundary. Upgrade: M35M1_V250922moderate effort Perform the U-Boot Recovery procedure to upgrade to the fixed firmware. Note that this process carries a risk of bricking the device.
WAVLINK WN535M3	<= M35M1_V210223
CPE No CPEs found in CPE dictionary for this product. Remediation Workaround:low effort Disable Mesh Mode to stop the sync_server from binding to TCP port 13136. Mitigation:low effort Block inbound TCP port 13136 at the network boundary. Upgrade: M35M1_V250922moderate effort Perform the U-Boot Recovery procedure to upgrade to the fixed firmware. Note that this process carries a risk of bricking the device.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 11, 2026	CVE Modified	CISA-ADP
Sep 11, 2026	New CVE Received	[email protected]