CVE-2026-36604 Security feature bypass in n/a
An attacker can bypass CORS restrictions via DNS rebinding to access internal router resources from the internet.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-36604?
CVE-2026-36604 is a medium-severity vulnerability in n/a, published on 3 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Mercusys AC12G (EU) V1 router with firmware AC12G(EU)_V1_200909 does not validate the HTTP Host header, enabling DNS rebinding attacks. An external attacker can rebind a domain to the router's internal IP address, extending the CORS wildcard vulnerability (Access-Control-Allow-Origin: *) to internet-originated attacks.
Weakness: CWE-350
Which versions are affected by CVE-2026-36604?
How do I fix CVE-2026-36604?
No fix has been published for CVE-2026-36604 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-36604 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-36604 exists.
Sources
Also known as GHSA-rv93-ggmg-88r9.