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CVE-2021-40117

HIGH CVSS: 8.6 Published: 2021-10-27 Modified: 2026-08-11

Description

A vulnerability in SSL/TLS message handler for 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 on an affected device. This vulnerability exists because incoming SSL/TLS packets are not properly processed. An attacker could exploit this vulnerability by sending a crafted SSL/TLS packet to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

Affected Platforms

Cisco Asa 5585-XCisco Asa 5525-XCisco Secure Firewall Threat DefenseCisco Adaptive Security Appliance SoftwareCisco Asa 5515-XCisco Asa 5545-X FirmwareCisco Asa 5585-X FirmwareCisco Asa 5512-X FirmwareCisco Adaptive Security ApplianceCisco Asa 5580 Firmware

Weakness Type

CWE-119, CWE-400

References