CVE-2026-19386 Memory corruption in Router
An authenticated nearby attacker can execute arbitrary code on ASUS routers by uploading a crafted configuration file that triggers a stack-based buffer overflow.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19386?
CVE-2026-19386 is a critical memory corruption vulnerability in ASUS Router, published on 7 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A stack-based buffer overflow in the ASUS router modules allows an authenticated nearby user to execute arbitrary code via a crafted configuration file upload that exceeds the expected buffer size.Refer to the ' Security Update for ASUS Router Firmware ' section on the ASUS Security Advisory for more information.
Weakness: CWE-121
Which versions are affected by CVE-2026-19386?
How do I fix CVE-2026-19386?
No fix has been published for CVE-2026-19386 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-2026-19386 being exploited?
There is no known exploitation of CVE-2026-19386 in the wild and no public exploit code.
Sources
Also known as GHSA-rx2g-2998-5867.