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Zyxel is aware of the recently disclosed vulnerabilities of dnsmasq, as identified in US-CERT vulnerability note VU#973527 with vulnerability IDs CVE-2017-14491 through CVE-2017-14496 and CVE-2017-13704, as listed in table 1. However, an attacker cannot exploit CVE-2019-15799 to CVE-2019-15804 vulnerabilities unless he/she possesses a user’s privileged account and access via SSH. What should you do? A thorough investigation has confirmed that GS1900 series switches are Zyxel’s only affected models.