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CVE-2021-40118

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

Description

A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a denial of service (DoS) condition. This vulnerability is due to improper input validation when parsing HTTPS requests. An attacker could exploit this vulnerability by sending a malicious HTTPS request to an affected device. A successful exploit could allow the attacker to cause the 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-121, CWE-787

References