Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%

Buy Us a Coffee

CVE-2026-124562— D-Link DIR-878 HNAP SetWanSettings buffer overflow

Quick assessment

Affected

D-Link DIR-878

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-878（固件版本 1.20B05）中发现了一个安全漏洞。该漏洞影响 HNAP 处理组件中的功能。攻击者可通过操纵和参数，触发缓冲区溢出。该攻击可远程发起，且利用代码已在公开渠道发布，存在被实际利用的风险。此漏洞仅影响厂商已不再提供支持的产品。

CVSS 7.5 · High Updated Nov 09, 2026

Possible ATT&CK Techniques 2 AI

T1068.001 T1190 · Exploit Public-Facing Application

Get alerts for future matching vulnerabilities Log in to subscribe

Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

D-Link DIR-878 HNAP SetWanSettings buffer overflow

Source: CVE Program / CVE List V5

Vulnerability Description

A vulnerability was identified in D-Link DIR-878 1.20B05. Affected is the function SetWanSettings of the component HNAP Handler. The manipulation of the argument ConfigDNS/Primary/ConfigDNS/Secondary leads to buffer overflow. The attack may be initiated remotely. The exploit is publicly available and might be used. This vulnerability only affects products that are no longer supported by the maintainer.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
D-Link	DIR-878	1.20B05	`cpe:2.3:h:d-link:dir-878::::::::`

II. Public POCs for CVE-2026-124562

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-124562

请登录查看更多情报信息。

Vendor Pages for CVE-2026-124562 (1)

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

Other References for CVE-2026-124562 (5)

https://github.com/Zimo-666/DIR-878-cves/tree/main/02-setwansettings-dns-stack-overflow broken-link exploit
https://vuldb.com/cve/CVE-2026-124562 third-party-advisory
https://vuldb.com/vuln/432894/cti signature permissions-required
https://vuldb.com/vuln/432894 vdb-entry technical-description
https://vuldb.com/submit/1035618 third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-124562

Same Patch Batch · D-Link · 2026-11-09 · 5 CVEs total

CVE-2026-124560	9.8 CRITICAL	D-Link DIR-878 HNAP prog.cgi GetCAPTCHAsetting heap-based overflow
CVE-2026-124563	7.5 HIGH	D-Link DIR-878 HNAP SetWanSettings buffer overflow
CVE-2026-124561	7.5 HIGH	D-Link DIR-878 HNAP prog.cgi SetVLANSettings stack-based overflow
CVE-2026-124564	5.3 MEDIUM	D-Link DIR-878 HNAP prog.cgi GetListDirectory path traversal

IV. Related Vulnerabilities

Same product: DIR-878

Same vendor: D-Link

Same weakness: CWE-120