What is CVE-2026-90692?

CVE-2026-90692 is a critical-severity vulnerability in D-Link Dir-878, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.9/10. Published 2026-09-14.

How severe is CVE-2026-90692?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Buffer overflow in D-Link Dir-878

CVE-2026-90692

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.

Vulnerability class: Buffer Overflow

EPSS: 0.005 (39.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

D-link Dir-878 — versions 120B05

Weakness classification (CWE)

References

cna@vuldb.com (related)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (product)

Frequently asked questions

What is CVE-2026-90692?: CVE-2026-90692 is a critical-severity vulnerability in D-Link Dir-878, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.9/10. Published 2026-09-14.
How severe is CVE-2026-90692?: Critical severity. CVSS v3 base score is 9.9 out of 10.