CVE-2026-31267 Memory corruption in n/a
An authenticated administrator can cause a denial of service on Mercusys MW302R routers via a stack buffer overflow in the web interface.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-31267?
CVE-2026-31267 is a medium-severity memory corruption vulnerability in n/a, published on 9 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Mercusys MW302R MW302R(EU)_V1_1.4.10 Build 231023 is vulnerable to Buffer Overflow in the administrative web interface. A stack buffer overflow vulnerability in the administrative web interface allows an authenticated attacker with administrative privileges to trigger a system crash by sending a specially crafted request. The vulnerability results in denial of service through control flow manipulation to an arbitrary instruction address.
Weakness: CWE-121
Which versions are affected by CVE-2026-31267?
How do I fix CVE-2026-31267?
No fix has been published for CVE-2026-31267 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-2026-31267 being exploited?
There is no known exploitation of CVE-2026-31267 in the wild and no public exploit code.
Sources
Also known as GHSA-644p-552c-3f48.