Critical severity · published Sep 14, 2026
CVE-2026-90693
D-Link DIR-878 WAN Settings SetWan3Settings stack-based overflow
9.9
CVSS
0.9%
EPSS
No
On KEV
Description
A flaw has been found in D-Link DIR-878 120B05. This impacts the function SetWan3Settings of the component WAN Settings. This manipulation of the argument Primary/Secondary causes stack-based buffer overflow. Remote exploitation of the attack is possible.
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-878 · D-Link
120B05 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-90693
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-90693
github.com
https://github.com/Amalll-Sec/router-vulnerability-research/blob/main/advisories/d-link/dir-878/SetWan3Settings/README.md
vuldb.com
https://vuldb.com/cve/CVE-2026-90693
vuldb.com
https://vuldb.com/submit/915573
vuldb.com
https://vuldb.com/vuln/403226
vuldb.com
https://vuldb.com/vuln/403226/cti
www.dlink.com
https://www.dlink.com/
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