D-Link DIR-505 TFTP Upload Filename tftpd mp_upload_file stack-based overflow

Summary

A vulnerability was identified in D-Link DIR-505 1.10B02. Affected is the function save_upload_file/mp_upload_file of the file /usr/bin/tftpd of the component TFTP Upload Filename Handler. The manipulation leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit is publicly available and might be used.

Remediation

1. Inventory every D-Link DIR-505 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-2026-120189
• Advisoryhttps://vuldb.com/submit/1027185
• Referencehttps://github.com/Walnut1337/DIR-505_filename_rce/tree/main/poc
• Referencehttps://vuldb.com/vuln/429528
• Referencehttps://vuldb.com/vuln/429528/cti
• Referencehttps://www.dlink.com/