A vulnerability in the Internet Key Exchange version 1 (IKEv1) feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper management of system memory. An attacker could exploit this vulnerability by sending malicious IKEv1 traffic to an affected device. The attacker does not need valid credentials to authenticate the VPN session, nor does the attacker's source address need to match a peer statement in the crypto map applied to the ingress interface of the affected device. An exploit could allow the attacker to exhaust system memory resources, leading to a reload of an affected device.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.6, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 24 products from cisco, from cisco, from cisco and 21 others, organizations running these solutions should prioritize assessment and patching.
First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.
2019-10-02T19:15:15.217
2026-06-17T02:19:57.330
Modified
CVSSv3.1: 8.6 (HIGH)
AV:N/AC:L/Au:N/C:N/I:N/A:C
10.0
6.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | cisco | adaptive_security_appliance_software | < 9.8.4.10 | Yes |
| Operating System | cisco | adaptive_security_appliance_software | < 9.9.2.47 | Yes |
| Operating System | cisco | adaptive_security_appliance_software | < 9.10.1.30 | Yes |
| Operating System | cisco | adaptive_security_appliance_software | < 9.12.2.5 | Yes |
| Application | cisco | firepower_threat_defense | < 6.2.3.11 | Yes |
| Application | cisco | firepower_threat_defense | < 6.3.0.2 | Yes |
| Operating System | cisco | asa_5505_firmware | 9.9\(2.4\) | Yes |
| Operating System | cisco | asa_5505_firmware | 201.4\(1.21\) | Yes |
| Hardware | cisco | asa_5505 | - | No |
| Operating System | cisco | asa_5510_firmware | 9.9\(2.4\) | Yes |
| Operating System | cisco | asa_5510_firmware | 201.4\(1.21\) | Yes |
| Hardware | cisco | asa_5510 | - | No |
| Operating System | cisco | asa_5512-x_firmware | 9.9\(2.4\) | Yes |
| Operating System | cisco | asa_5512-x_firmware | 201.4\(1.21\) | Yes |
| Hardware | cisco | asa_5512-x | - | No |
| Operating System | cisco | asa_5515-x_firmware | 9.9\(2.4\) | Yes |
| Operating System | cisco | asa_5515-x_firmware | 201.4\(1.21\) | Yes |
| Hardware | cisco | asa_5515-x | - | No |
| Operating System | cisco | asa_5520_firmware | 9.9\(2.4\) | Yes |
| Operating System | cisco | asa_5520_firmware | 201.4\(1.21\) | Yes |
| Hardware | cisco | asa_5520 | - | No |
| Operating System | cisco | asa_5525-x_firmware | 9.9\(2.4\) | Yes |
| Operating System | cisco | asa_5525-x_firmware | 201.4\(1.21\) | Yes |
| Hardware | cisco | asa_5525-x | - | No |
| Operating System | cisco | asa_5540_firmware | 9.9\(2.4\) | Yes |
| Operating System | cisco | asa_5540_firmware | 201.4\(1.21\) | Yes |
| Hardware | cisco | asa_5540 | - | No |
| Operating System | cisco | asa_5545-x_firmware | 9.9\(2.4\) | Yes |
| Operating System | cisco | asa_5545-x_firmware | 201.4\(1.21\) | Yes |
| Hardware | cisco | asa_5545-x | - | No |
| Operating System | cisco | asa_5550_firmware | 9.9\(2.4\) | Yes |
| Operating System | cisco | asa_5550_firmware | 201.4\(1.21\) | Yes |
| Hardware | cisco | asa_5550 | - | No |
| Operating System | cisco | asa_5555-x_firmware | 9.9\(2.4\) | Yes |
| Operating System | cisco | asa_5555-x_firmware | 201.4\(1.21\) | Yes |
| Hardware | cisco | asa_5555-x | - | No |
| Operating System | cisco | asa_5580_firmware | 9.9\(2.4\) | Yes |
| Operating System | cisco | asa_5580_firmware | 201.4\(1.21\) | Yes |
| Hardware | cisco | asa_5580 | - | No |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.