Zyxel: news, advisories and analysis

The coverage includes 1 vulnerability advisory. 1 advisory is rated critical or high severity, and 1 involves a flaw listed in CISA's Known Exploited Vulnerabilities catalog.

Stories on Zyxel most often intersect with GS1900, Network Switch and Buffer Overflow, with Technology, Cloud & SaaS the most affected sector. The most recent story, “Zyxel GS1900 Switches Exploited in the Wild via CGI Buffer Overflow”, was published 22 Sep 2026. Every article is listed below, newest first, with the affected products, severity and remediation guidance in each piece.