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CVE-2026-90680— D-Link DIR-823G HNAP1 SetStaticRouteSettings strcpy stack-based overflow

Quick assessment

Affected
D-Link DIR-823G
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-823G 1.0.2B05_20181207 中发现了安全漏洞。受影响的是组件 HNAP1 中文件 /HNAP1/SetStaticRouteSettings 的 strcpy 函数。对参数 PAddress/SubnetMask/Gateway 的操纵会导致基于栈的缓冲区溢出。该攻击可以远程发起。

CVSS 9.9 · Critical
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I. Basic Information for CVE-2026-90680

Vulnerability Information
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Vulnerability Title
D-Link DIR-823G HNAP1 SetStaticRouteSettings strcpy stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in D-Link DIR-823G 1.0.2B05_20181207. The impacted element is the function strcpy of the file /HNAP1/SetStaticRouteSettings of the component HNAP1. The manipulation of the argument PAddress/SubnetMask/Gateway results in stack-based buffer overflow. The attack can be launched remotely.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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-823G 1.0.2B05_20181207 cpe:2.3:h:d-link:dir-823g:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-90680

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III. Intelligence Information for CVE-2026-90680

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Proof of Concept for CVE-2026-90680 (1)

Vendor Pages for CVE-2026-90680 (1)

Same Patch Batch · D-Link · 2026-09-14 · 3 CVEs total

CVE-2026-90693 9.9 CRITICAL D-Link DIR-878 WAN Settings SetWan3Settings stack-based overflow
CVE-2026-90692 9.9 CRITICAL D-Link DIR-878 Dynamic DNS IPv6 Settings SetDynamicDNSIPv6Settings stack-based overflow

IV. Related Vulnerabilities

Same product: DIR-823G
Same vendor: D-Link
Same weakness: CWE-121

V. Comments for CVE-2026-90680

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