CVE-2026-90693 D-Link DIR-878 WAN Settings SetWan3Settings stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the WAN settings function, potentially leading to arbitrary code execution on the device.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90693?
CVE-2026-90693 is a critical memory corruption vulnerability in D-Link DIR-878, published on 14 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw has been found in D-Link DIR-878 120B05. This impacts the function SetWan3Settings of the component WAN Settings. This manipulation of the argument Primary/Secondary causes stack-based buffer overflow. Remote exploitation of the attack is possible.
Which versions are affected by CVE-2026-90693?
How do I fix CVE-2026-90693?
No fix has been published for CVE-2026-90693 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-90693 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90693 exists.
Sources
Also known as GHSA-vg87-cmh7-p8wr.