CVE-2026-90693: D-Link DIR-878 WAN Settings SetWan3Settings stack-based overflow

Severity: critical (CVSS 9.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-14 · updated 2026-09-15
Weakness: CWE-119

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.

Affected products

D-Link DIR-878: 120B05

References

https://github.com/Amalll-Sec/router-vulnerability-research/blob/main/advisories/d-link/dir-878/SetWan3Settings/README.md
https://vuldb.com/cve/CVE-2026-90693
https://vuldb.com/submit/915573
https://vuldb.com/vuln/403226
https://vuldb.com/vuln/403226/cti
https://www.dlink.com/
https://github.com/Amalll-Sec/router-vulnerability-research/blob/main/advisories/d-link/dir-878/SetWan3Settings/README.md

Get alerted when CVE-2026-90693 or the next vulnerability affects your stack