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.
Published: 2021-10-27
Score: 5.3 Medium
EPSS: 1.0% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2021-27312 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.
History

Tue, 11 Aug 2026 20:00:00 +0000

Type Values Removed Values Added
First Time appeared Cisco secure Firewall Threat Defense
CPEs cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*
Vendors & Products Cisco firepower Threat Defense
Cisco secure Firewall Threat Defense

Thu, 07 Nov 2024 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Subscriptions

Cisco Adaptive Security Appliance Software Asa 5505 Asa 5505 Firmware Asa 5512-x Asa 5512-x Firmware Asa 5515-x Asa 5515-x Firmware Asa 5525-x Asa 5525-x Firmware Asa 5545-x Asa 5545-x Firmware Asa 5555-x Asa 5555-x Firmware Asa 5580 Asa 5580 Firmware Asa 5585-x Asa 5585-x Firmware Secure Firewall Threat Defense
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2024-11-07T21:46:26.254Z

Reserved: 2021-08-25T00:00:00.000Z

Link: CVE-2021-40125

cve-icon Vulnrichment

Updated: 2024-08-04T02:27:31.867Z

cve-icon NVD

Status : Modified

Published: 2021-10-27T19:15:08.877

Modified: 2026-08-11T19:37:30.880

Link: CVE-2021-40125

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses