CVE-2026-124562 D-Link DIR-878 HNAP SetWanSettings buffer overflow

High 8.7 Published 9 Nov 2026 Updated 9 Nov 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-124562?

CVE-2026-124562 is a high-severity vulnerability in D-Link DIR-878, published on 9 Nov 2026.

Official description

A vulnerability was identified in D-Link DIR-878 1.20B05. Affected is the function SetWanSettings of the component HNAP Handler. The manipulation of the argument ConfigDNS/Primary/ConfigDNS/Secondary leads to buffer overflow. The attack may be initiated remotely. The exploit is publicly available and might be used. This vulnerability only affects products that are no longer supported by the maintainer.

Weakness: CWE-120, CWE-119

Which versions are affected by CVE-2026-124562?

How do I fix CVE-2026-124562?

No fix has been published for CVE-2026-124562 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-124562 being exploited?

There is no known exploitation of CVE-2026-124562 in the wild and no public exploit code.

Sources

Also known as GHSA-xq98-q783-w24j.