CVE-2025-4139 Netgear EX6120 fwAcosCgiInbound buffer overflow
A remote buffer overflow in the Netgear EX6120 firmware allows attackers to execute arbitrary code via the host argument.
- 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-2025-4139?
CVE-2025-4139 is a high-severity memory corruption vulnerability in Netgear EX6120, 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 classified as critical was found in Netgear EX6120 1.0.0.68. Affected by this vulnerability is the function fwAcosCgiInbound. The manipulation of the argument host leads to buffer overflow. The attack can be launched remotely. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2025-4139?
It affects 1 product.
Products include Netgear Ex6120 Firmware.
How do I fix CVE-2025-4139?
No fix has been published for CVE-2025-4139 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-2025-4139 being exploited?
There is no known exploitation of CVE-2025-4139 in the wild and no public exploit code.
Other vulnerabilities in Netgear EX6120
Sources
Also known as GHSA-w56q-jx3j-44rq.