Zyxel security advisory for DoS vulnerability of APs

Zyxel_May

CVE: CVE-2022-45854

Summary

Zyxel has released patches for access points (AP) affected by a temporary denial-of-service (DoS) vulnerability. Users are advised to install them for optimal protection.

What is the vulnerability?

An improper check for unusual conditions in some APs could allow an attacker to cause a temporary DoS by sending crafted VLAN frames if the MAC address of the vulnerable AP were known.

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
NWA110AX	6.45(ABTG.0)C0 and earlier	6.50(ABTG.0)C0
NWA210AX	6.45(ABTD.0)C0 and earlier	6.50(ABTD.0)C0
WAX510D	6.45(ABTF.0)C0 and earlier	6.50(ABTF.0)C0
WAX610D	6.45(ABTE.0)C0 and earlier	6.50(ABTE.0)C0
WAX630S	6.45(ABZD.0)C0 and earlier	6.50(ABZD.0)C0
WAX650S	6.45(ABRM.0)C0 and earlier	6.50(ABRM.0)C0

If an on-market product is not listed above, it is NOT affected.

Got a question?

Please contact your local service rep or visit Zyxel’s Community for further information or assistance.

Acknowledgement

Thanks to Luci Stanescu for reporting the issue to us.

Revision history

2023-2-7: Initial release