【Zyxel Communications】Announcement by Subsidiary Zyxel Turkey Regarding General Manager Change

1. Date of board resolution or change: 2026/05/04 2. Personnel category (please enter Chairman or General Manager): General Manager 3. Name of former person: Karsten Gewecke 4. Brief resume of former person: General Manager of Zyxel Turkey 5. Name of new person: Lin Chin-Lan 6. Brief resume of new person: Director of Zyxel Communications Corporation 7. Type of change (please enter "Resignation", "Dismissal", "Term Expired", "Position Adjustment", "Layoff", "Retirement", "Death", or "New Appointment"): Position adjustment. 8. Reason for change: Position adjustment. 9. Effective date of new appointment: 2026/05/04 10. Other matters to be specified (If the event or the subject of the resolution belongs to a public offering or above company, this material information also conforms to Article 7, Paragraph 6 of the Enforcement Rules of the Securities and Exchange Act, which has a significant impact on shareholders' equity or securities prices): None. Keywords: Material Information