CVE-2026-124563 D-Link DIR-878 HNAP SetWanSettings buffer overflow
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-124563?
CVE-2026-124563 is a high-severity vulnerability in D-Link DIR-878, published on 9 Nov 2026.
Official description
A security flaw has been discovered in D-Link DIR-878 1.20B05. Affected by this vulnerability is the function SetWanSettings of the component HNAP Handler. The manipulation of the argument Primary/Secondary results in buffer overflow. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. This vulnerability only affects products that are no longer supported by the maintainer.
Which versions are affected by CVE-2026-124563?
How do I fix CVE-2026-124563?
No fix has been published for CVE-2026-124563 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-124563 being exploited?
There is no known exploitation of CVE-2026-124563 in the wild and no public exploit code.
Sources
Also known as GHSA-9rhh-p487-5cp4.