CVE-2026-94100 Netcore NBR200V2 WAN VLAN Reconfiguration routerd wan_config_set_vlan buffer overflow
Remote attackers can trigger a buffer overflow in the WAN VLAN configuration function, potentially leading to code execution or service disruption.
- 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-2026-94100?
CVE-2026-94100 is a critical memory corruption vulnerability in Netcore NBR200V2, published on 21 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A weakness has been identified in Netcore NBR200V2 1.3.241127.071246. Impacted is the function wan_config_set_vlan of the file /usr/bin/routerd of the component WAN VLAN Reconfiguration. Executing a manipulation of the argument vlan_wanX.ports can lead to buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-94100?
How do I fix CVE-2026-94100?
No fix has been published for CVE-2026-94100 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-2026-94100 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-94100 exists.
Sources
Also known as GHSA-243x-w9gp-rr5q.