[Chunghwa Telecom Subsidiary] Announcement of Board Member Change

1. Date of Change: 2026/06/26 2. Corporate Name: Chunghwa Telecom Co., Ltd. 3. Former Director's Name: Ko Su-chiu 4. Former Director's Background: Deputy General Manager, Consumer & Home Services Division, Chunghwa Telecom Co., Ltd. 5. New Director's Name: Chin Hung-ling 6. New Director's Background: Deputy General Manager, Consumer & Home Services Division, Chunghwa Telecom Co., Ltd. 7. Reason for Change: Replacement of corporate director representative 8. Original Term (e.g., xx/xx/xx to xx/xx/xx): 2025/05/28 to 2028/05/27 9. Effective Date of New Appointment: 2026/06/30 10. Other Matters to be Disclosed: None