Critical severity · published Sep 14, 2026
CVE-2026-90680
D-Link DIR-823G HNAP1 SetStaticRouteSettings strcpy stack-based overflow
9.9
CVSS
0.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 60% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DI
DIR-823G · D-Link
1.0.2B05_20181207 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-90680
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-90680
github.com
https://github.com/Amalll-Sec/router-vulnerability-research/blob/main/advisories/d-link/dir-823g/SetStaticRouteSettings/README.md
vuldb.com
https://vuldb.com/cve/CVE-2026-90680
vuldb.com
https://vuldb.com/submit/914902
vuldb.com
https://vuldb.com/vuln/403213
vuldb.com
https://vuldb.com/vuln/403213/cti
www.dlink.com
https://www.dlink.com/
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D-Link DIR-823G v1.0.2B05_20181207 is vulnerable to Information Disclosure