CVE-2026-36607 Auth bypass in n/a
Unauthenticated attackers on the adjacent network can brute-force passwords via the TDDP endpoint due to missing rate limiting, potentially gaining administrative access.
- 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-2026-36607?
CVE-2026-36607 is a high-severity authentication bypass 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 allows unauthenticated brute-force attacks via the TDDP password change endpoint (code=10), which lacks the rate limiting applied to the login endpoint (code=7). An attacker on the adjacent network can attempt unlimited passwords without triggering account lockout.
Weakness: CWE-307
Which versions are affected by CVE-2026-36607?
How do I fix CVE-2026-36607?
No fix has been published for CVE-2026-36607 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-36607 being exploited?
There is no known exploitation of CVE-2026-36607 in the wild and no public exploit code.
Sources
Also known as GHSA-66mf-3gg5-cm75.