CVE-2026-90680

D-Link DIR-823G HNAP1 SetStaticRouteSettings strcpy stack-based overflow

State: Published
Severity: 9.4 Critical
Published: Sep 14, 2026
Updated: Sep 16, 2026
Reserved: Sep 13, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	9.4 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X	VulDB
3.1	9.9 Critical	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:R	VulDB
3.0	9.9 Critical	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:R	VulDB
2.0	9.0 High	AV:N/AC:L/Au:S/C:C/I:C/A:C/E:ND/RL:ND/RC:UR	VulDB

Weaknesses

CWE-121 Stack-based Buffer Overflow
CWE-119 Memory Corruption

Affected Products

Product	Versions
DIR-823GD-Link	1.0.2B05_20181207Affected

References

VDB-403213 | D-Link DIR-823G HNAP1 SetStaticRouteSettings strcpy stack-based overflowvdb-entrytechnical-description
VDB-403213 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
CVE-2026-90680 | CVE Analysis and Reportthird-party-advisory
Submit #914902 | D-Link Router DIR823G_V1.0.2B05_20181207 Memory Corruptionthird-party-advisory
https://github.com/Amalll-Sec/router-vulnerability-research/blob/main/advisories/d-link/dir-823g/SetStaticRouteSettings/README.mdrelated
https://www.dlink.com/product

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