CVE-2026-4227 LB-LINK BL-WR9000 get_hidessid_cfg sub_44D844 buffer overflow
Remote attackers can exploit a buffer overflow in the LB-LINK BL-WR9000 router to potentially execute arbitrary code or cause a 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-2026-4227?
CVE-2026-4227 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 security vulnerability has been detected in LB-LINK BL-WR9000 2.4.9. The impacted element is the function sub_44D844 of the file /goform/get_hidessid_cfg. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-4227?
It affects 1 product.
Products include Lb-Link Bl-Wr9000 Firmware.
How do I fix CVE-2026-4227?
No fix has been published for CVE-2026-4227 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-2026-4227 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4227 exists.
Other vulnerabilities in LB-LINK BL-WR9000
Sources
Also known as GHSA-hj3v-rf5w-w57g.