Multiple Vulnerabilities in Link Layer Discovery Protocol of Cisco ATA 190 Series

CVE-2022-20686

What is CVE-2022-20686?

Multiple security vulnerabilities in the Link Layer Discovery Protocol (LLDP) of the Cisco ATA 190 Series Analog Telephone Adapter firmware may allow an unauthenticated, remote attacker to conduct arbitrary code execution. These weaknesses stem from inadequate validation of certain LLDP packet header fields. An attacker could send a specially crafted LLDP packet to an affected device, which would exploit these vulnerabilities, leading to unexpected LLDP service reboots and potentially resulting in a denial of service.

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