CVE-2026-124561 D-Link DIR-878 HNAP prog.cgi SetVLANSettings stack-based overflow
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-124561?
CVE-2026-124561 is a high-severity vulnerability in D-Link DIR-878, published on 9 Nov 2026.
Official description
A vulnerability was determined in D-Link DIR-878 1.20B05. This impacts the function SetVLANSettings of the file prog.cgi of the component HNAP Handler. Executing a manipulation of the argument VID can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. This vulnerability only affects products that are no longer supported by the maintainer.
Which versions are affected by CVE-2026-124561?
How do I fix CVE-2026-124561?
No fix has been published for CVE-2026-124561 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-124561 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-124561 exists.
Sources
Also known as GHSA-2q4f-mcgv-82h7.