CVSS 3.1 Score 8.6 of 10 (high)


Published Sep 27, 2023
Updated: Jan 25, 2024
CWE ID 823


CVE-2023-20187 is a vulnerability in the Multicast Leaf Recycle Elimination (mLRE) feature of Cisco IOS XE Software for Cisco ASR 1000 Series Aggregation Services Routers. It could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition by causing the affected device to reload. The vulnerability occurs due to incorrect handling of certain IPv6 multicast packets on the device. To remediate this vulnerability, users are advised to apply the necessary updates or patches provided by Cisco. The potential danger posed to an organization is the disruption of services and potential downtime caused by the DoS attack.

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