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CVE-2021-40125

MEDIUM CVSS: 5.3 Published: 2021-10-27 Modified: 2026-08-11

Description

A vulnerability in the Internet Key Exchange Version 2 (IKEv2) implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to trigger a denial of service (DoS) condition on an affected device. This vulnerability is due to improper control of a resource. An attacker with the ability to spoof a trusted IKEv2 site-to-site VPN peer and in possession of valid IKEv2 credentials for that peer could exploit this vulnerability by sending malformed, authenticated IKEv2 messages to an affected device. A successful exploit could allow the attacker to trigger a reload of the device.

Affected Platforms

Cisco Asa 5555-X FirmwareCisco Asa 5555-XCisco Asa 5525-XCisco Asa 5585-XCisco Secure Firewall Threat DefenseCisco Adaptive Security Appliance SoftwareCisco Asa 5512-X FirmwareCisco Asa 5512-XCisco Asa 5515-XCisco Asa 5545-X Firmware

Weakness Type

CWE-416, CWE-400

References