CVE-2025-7882 Mercusys MW301R Login excessive authentication
Attackers on the local network can bypass login attempt restrictions, potentially facilitating brute-force attacks against the router.
- 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-2025-7882?
CVE-2025-7882 is a low-severity vulnerability in Mercusys MW301R, published on 20 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was found in Mercusys MW301R 1.0.2 Build 190726 Rel.59423n. It has been rated as problematic. This issue affects some unknown processing of the component Login. The manipulation leads to improper restriction of excessive authentication attempts. The attack can only be initiated within the local network. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2025-7882?
How do I fix CVE-2025-7882?
No fix has been published for CVE-2025-7882 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-7882 being exploited?
There is no known exploitation of CVE-2025-7882 in the wild and no public exploit code.
Sources
Also known as GHSA-36fg-v524-g4r4.