CVE-2026-36607
High
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.
SeverityHigh
CVSS8.8
Exploit probability—
ProductAC12G (EU) V1 router
PublishedJun 3, 2026
First seenJun 3, 2026
Weakness typeCWE-307CWE-307
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Mercusys AC12G (EU) V1 router | AC12G(EU)_V1_200909 | — |
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