CVE-2026-36611 Information disclosure in n/a
Unauthenticated adjacent attackers can read uninitialized memory from Mercusys AC12G routers via malformed UPnP requests, potentially exposing sensitive internal data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-36611?
CVE-2026-36611 is a high-severity vulnerability in n/a, published on 3 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Mercusys AC12G (EU) V1 with firmware AC12G(EU)_V1_200909 returns 128 bytes of uninitialized buffer when receiving POST requests without SOAPAction header on UPnP port 1900, exposing internal memory to unauthenticated adjacent network attackers.
Weakness: CWE-200
Which versions are affected by CVE-2026-36611?
How do I fix CVE-2026-36611?
No fix has been published for CVE-2026-36611 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-36611 being exploited?
There is no known exploitation of CVE-2026-36611 in the wild and no public exploit code.
Sources
Also known as GHSA-rh54-5hmc-6qjg.