CVE-2026-4226 LB-LINK BL-WR9000 get_virtual_cfg sub_44E8D0 stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the LB-LINK BL-WR9000 router, potentially leading to code execution or denial of service.
- 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-2026-4226?
CVE-2026-4226 is a high-severity memory corruption vulnerability in LB-LINK BL-WR9000, published on 16 Mar 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 LB-LINK BL-WR9000 2.4.9. The affected element is the function sub_44E8D0 of the file /goform/get_virtual_cfg. Executing a manipulation can lead to stack-based 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-2026-4226?
It affects 1 product.
Products include Lb-Link Bl-Wr9000 Firmware.
How do I fix CVE-2026-4226?
No fix has been published for CVE-2026-4226 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-2026-4226 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4226 exists.
Other vulnerabilities in LB-LINK BL-WR9000
Sources
Also known as GHSA-97g2-6cfp-4vhx.