CVE-2026-90692: D-Link DIR-878 Dynamic DNS IPv6 Settings SetDynamicDNSIPv6Settings 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 vulnerability was detected in D-Link DIR-878 120B05. This affects the function SetDynamicDNSIPv6Settings of the component Dynamic DNS IPv6 Settings. The manipulation of the argument IPv6Address/Hostname results in stack-based buffer overflow. The attack may be launched remotely.

Affected products

D-Link DIR-878: 120B05

References

https://github.com/Amalll-Sec/router-vulnerability-research/blob/main/advisories/d-link/dir-878/SetDynamicDNSIPv6Settings/README.md
https://vuldb.com/cve/CVE-2026-90692
https://vuldb.com/submit/915572
https://vuldb.com/vuln/403225
https://vuldb.com/vuln/403225/cti
https://www.dlink.com/

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