CVE-2026-36605 Denial of service in n/a
An attacker can cause a persistent crash in Mercusys AC12G routers by sending crafted incomplete HTTP requests, requiring physical power cycling to recover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-36605?
CVE-2026-36605 is a medium-severity denial of service vulnerability in n/a, published on 3 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Mercusys AC12G (EU) V1 router with firmware AC12G(EU)_V1_200909 is vulnerable to a HTTP denial of service via a low number of crafted incomplete HTTP requests, causing a persistent crash that requires physical power cycling to recover.
Weakness: CWE-400
Which versions are affected by CVE-2026-36605?
How do I fix CVE-2026-36605?
No fix has been published for CVE-2026-36605 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-36605 being exploited?
There is no known exploitation of CVE-2026-36605 in the wild and no public exploit code.
Sources
Also known as GHSA-j2fc-v5xj-h5gr.