CVE-2025-4120 Netgear JWNR2000v2 sub_4238E8 buffer overflow
Remote attackers can trigger a buffer overflow in the Netgear JWNR2000v2 router via the host argument, potentially leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-4120?
CVE-2025-4120 is a high-severity memory corruption vulnerability in Netgear JWNR2000v2, published on 30 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in Netgear JWNR2000v2 1.0.0.11. It has been classified as critical. Affected is the function sub_4238E8. The manipulation of the argument host leads to buffer overflow. It is possible to launch the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2025-4120?
It affects 1 product.
Products include Netgear Jwnr2000v2 Firmware.
How do I fix CVE-2025-4120?
No fix has been published for CVE-2025-4120 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-4120 being exploited?
There is no known exploitation of CVE-2025-4120 in the wild and no public exploit code.
Other vulnerabilities in Netgear JWNR2000v2
Sources
Also known as GHSA-q66q-qwxm-vgrg.