Zyxel security advisory for buffer overflow vulnerability in 4G LTE and 5G NR outdoor routers
Zyxel has released patches for some 4G LTE and 5G NR outdoor routers affected by a buffer overflow vulnerability. Users are advised to install them for optimal protection.
What are the vulnerabilities?
A buffer overflow vulnerability in the CGI program of some Zyxel 4G LTE and 5G NR outdoor routers could allow a remote authenticated attacker to cause denial of service (DoS) conditions by sending a crafted HTTP request to a vulnerable device.
What versions are vulnerable—and what should you do?
After a thorough investigation, we’ve identified the vulnerable products that are within their vulnerability support period and released patches to address the vulnerability, as shown in the table below.
|Affected model||Affected version||Patch availability|
|LTE7480-M804||V1.00(ABRA.6)C0 and earlier||V1.00(ABRA.7)C0|
|LTE7490-M904||V1.00(ABQY.5)C0 and earlier||V1.00(ABQY.6)C0|
|NR7101||V1.00(ABUV.7)C0 and earlier||V1.00(ABUV.8)C0|
|Nebula NR7101||V1.15(ACCC.3)C0 and earlier||Hotfix available by July 12, 2023*
Standard patch V1.16(ACCC.0)C0 in Oct. 2023
*Please reach out to your local Zyxel support team for the file.
Got a question?
Please contact your local service rep or visit Zyxel’s Community for further information or assistance.
Thanks to Chengfeng Ye, Prism Research Group - cse hkust for reporting the issue to us.
2023-6-6: Initial release
2023-7-4: Updated the patch availability of Nebula NR7101