How severe is CVE-2021-34793?

This vulnerability has a severity rating of HIGH with a CVSS score of 8.6 out of 10.

What type of vulnerability is CVE-2021-34793?

This is classified as CWE-924, which is a common weakness in software security.

CVE-2021-34793 - HIGH Severity | CVSS 8.6

Vulnerability Description

A vulnerability in the TCP Normalizer of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software operating in transparent mode could allow an unauthenticated, remote attacker to poison MAC address tables, resulting in a denial of service (DoS) vulnerability. This vulnerability is due to incorrect handling of certain TCP segments when the affected device is operating in transparent mode. An attacker could exploit this vulnerability by sending a crafted TCP segment through an affected device. A successful exploit could allow the attacker to poison the MAC address tables in adjacent devices, resulting in network disruption.

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