WAVLINK WN536AX6-A OpenVPN protocol.csp strcpy stack-based overflow

Summary

A vulnerability was found in WAVLINK WN536AX6-A V260507. This affects the function strcpy of the file /protocol.csp of the component OpenVPN Handler. The manipulation of the argument openvpn_ip results in stack-based buffer overflow. The attack may be launched remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure.

Remediation

1. Inventory every WAVLINK WN536AX6-A deployment, including staging.
2. No fixed version appears in the public sources yet. Check the references below and the vendor directly.

References

• Advisoryhttps://vuldb.com/cve/CVE-2026-120281
• Advisoryhttps://vuldb.com/submit/919790
• Referencehttps://github.com/F-yyjy/cve/blob/main/WN536AX6-A_openvpn_ip.md
• Referencehttps://vuldb.com/vuln/429625
• Referencehttps://vuldb.com/vuln/429625/cti