Vulnerability · Published Sep 14, 2026 · Assigned by VulDB
CVE-2026-90680D-Link DIR-823G HNAP1 SetStaticRouteSettings strcpy stack-based overflow
Critical 9.9
In plain English
A critical-severity stack buffer overflow in DIR-823G from D-Link. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities).
Severity (CVSS 3.1)9.9Critical
Exploit odds (30 days)0.9%top 39.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-121, CWE-119 · Vector: 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
References
- VDB-403213 | D-Link DIR-823G HNAP1 SetStaticRouteSettings strcpy stack-based overflow vdb-entry, technical-description
- VDB-403213 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- CVE-2026-90680 | CVE Analysis and Report third-party-advisory
- Submit #914902 | D-Link Router DIR823G_V1.0.2B05_20181207 Memory Corruption third-party-advisory
- https://github.com/Amalll-Sec/router-vulnerability-research/blob/main/advisories/d-link/dir-823g/SetStaticRouteSettings/README.md related
- https://www.dlink.com/ product