Buffer overflow in D-Link Dir-505
CVE-2026-120189
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.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- D-Link Dir-505 — versions 1.10B02
Weakness classification (CWE)
References
- vuldb.com/vuln/429528 (technical-description, vdb-entry)
- vuldb.com/vuln/429528/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-120189 (third-party-advisory)
- vuldb.com/submit/1027185 (third-party-advisory)
- github.com/Walnut1337/DIR-505_filename_rce/tree/main/poc (exploit)
- www.dlink.com/ (product)
Frequently asked questions
- What is CVE-2026-120189?
- CVE-2026-120189 is a critical-severity vulnerability in D-Link Dir-505, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 10.0/10. Published 2026-11-01.
- How severe is CVE-2026-120189?
- Critical severity. CVSS v3 base score is 10.0 out of 10.