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CVE-2023-20086

HIGH CVSS: 8.6 Published: 2023-11-01 Modified: 2026-08-11

Description

A vulnerability in ICMPv6 processing of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to improper processing of ICMPv6 messages. An attacker could exploit this vulnerability by sending crafted ICMPv6 messages to a targeted Cisco ASA or FTD system with IPv6 enabled. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

Affected Platforms

Cisco Adaptive Security Appliance SoftwareCisco Secure Firewall Threat Defense

Weakness Type

CWE-248, NVD-CWE-noinfo

References