CVE-2026-3606 Ettercap etterfilter ef_output.c add_data_segment out-of-bounds
A local attacker can trigger an out-of-bounds read in Ettercap's etterfilter component, potentially causing a crash or arbitrary code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3606?
CVE-2026-3606 is a medium-severity memory corruption vulnerability in Ettercap, published on 5 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability has been found in Ettercap 0.8.4-Garofalo. Affected by this vulnerability is the function add_data_segment of the file src/ettercap/utils/etterfilter/ef_output.c of the component etterfilter. The manipulation leads to out-of-bounds read. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-3606?
It affects 1 product.
Products include Ettercap-Project Ettercap.
How do I fix CVE-2026-3606?
No fix has been published for CVE-2026-3606 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-2026-3606 being exploited?
There is no known exploitation of CVE-2026-3606 in the wild and no public exploit code.
Other vulnerabilities in Ettercap
Sources
Also known as DEBIAN-CVE-2026-3606, GHSA-2cjg-466r-p8w4, UBUNTU-CVE-2026-3606.