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CVE-2026-120189— D-Link DIR-505 TFTP Upload Filename tftpd mp_upload_file stack-based overflow

Quick assessment

Affected

D-Link DIR-505

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 D-Link DIR-505 固件版本 1.10B02 中发现了一个安全漏洞。该漏洞影响组件"TFTP 上传文件名处理器”中文件的和函数。攻击者可通过恶意构造输入触发基于栈的缓冲区溢出。该漏洞可被远程利用，且相关利用代码已在公开渠道发布，存在被实际利用的风险。

CVSS 10.0 · Critical EPSS 1.35% · P71 Updated Nov 01, 2026

Possible ATT&CK Techniques 2 AI

T1068.001 T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

Vendor	Product	Version Range	Status
D-Link	DIR-505	`1.10B02`	affected

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Vulnerability Information

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Vulnerability Title

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

Source: CVE Program / CVE List V5

Vulnerability Description

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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

栈缓冲区溢出

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
D-Link	DIR-505	1.10B02	`cpe:2.3:h:d-link:dir-505::::::::`

II. Public POCs for CVE-2026-120189

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-120189

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Vendor Pages for CVE-2026-120189 (1)

Smart Home, SMB and Enterprise solutions | D-Link product

Other References for CVE-2026-120189 (5)

https://github.com/Walnut1337/DIR-505_filename_rce/tree/main/poc exploit
https://vuldb.com/cve/CVE-2026-120189 third-party-advisory
https://vuldb.com/vuln/429528/cti signature permissions-required
https://vuldb.com/submit/1027185 third-party-advisory
https://vuldb.com/vuln/429528 vdb-entry technical-description

https://www.cve.org/CVERecord?id=CVE-2026-120189

IV. Related Vulnerabilities

Same product: DIR-505

CVE-2026-118579
D-Link DIR-505 Web Management CGI secmark1524.cgi main backd

Same vendor: D-Link

Same weakness: CWE-121