CVE-2024-20426
Detail
Description
A vulnerability in the Internet Key Exchange version 2 (IKEv2) protocol for VPN termination of 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 is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted IKEv2 traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
Metrics
CVSS Version 4.0
CVSS Version 3.x
CVSS Version 2.0
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS 2.0 Severity and Vector Strings:
NVD assessment
not yet provided.
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Weakness Enumeration
CWE-ID
CWE Name
Source
NVD-CWE-noinfo
Insufficient Information
NIST
CWE-476
NULL Pointer Dereference
Cisco Systems, Inc.
Change History
25 change records found show changes
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.0.1:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.0.1:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.1:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.1:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.3:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.3:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.4:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.4:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.5.1:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.5.1:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.3.0:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.0:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.3.1:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.1:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.4.1.1:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.1.1:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.8.1:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.8.1:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.8:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.8:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.5.2:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.5.2:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.7:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.7:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.6:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.6:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.0:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.0:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.2:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.2:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.4.1:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.4.1:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.5:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.5:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.3.1.1:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.1.1:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.4.0:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.0:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.4.1:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.1:*:*:*:*:*:*:*
CPE Deprecation Remap by NIST
8/11/2026 3:40:47 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.3.1.2:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.1.2:*:*:*:*:*:*:*
CVE Modified by CISA-ADP
6/17/2026 3:07:00 AM
Action
Type
Old Value
New Value
Added
Affected
Record truncated, showing 2048 of 2647 characters.
View Entire Change Record [{"vendor":"cisco","product":"adaptive_security_appliance_software","defaultStatus":"unknown","cpes":["cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*"],"versions":[{"version":"9.18.1","status":"affected"},{"version":"9.18.1.3","status":"affected"},{"version":"9.18.2","status":"affected"},{"version":"9.18.2.5","status":"affected"},{"version":"9.18.2.7","status":"affected"},{"version":"9.18.2.8","status":"affected"},{"version":"9.18.3","status":"affected"},{"version":"9.18.3.39","status":"affected"},{"version":"9.18.3.46","status":"affected"},{"version":"9.18.3.53","status":"affected"},{"version":"9.18.3.55","status":"affected"},{"version":"9.18.3.56","status":"affected"},{"version":"9.18.4","status":"affected"},{"version":"9.18.4.5","status":"affected"},{"version":"9.18.4.8","status":"affected"},{"version":"9.18.4.22","status":"affected"},{"version":"9.18.4.24","status":"affected"},{"version":"9.18.4.29","status":"affected"},{"version":"9.19.1","status":"affected"},{"version":"9.19.1.5","status":"affected"},{"version":"9.19.1.9","status":"affected"},{"version":"9.19.1.12","status":"affected"},{"version":"9.19.1.18","status":"affected"},{"version":"9.19.1.22","status":"affected"},{"version":"9.19.1.24","status":"affected"},{"version":"9.19.1.27","status":"affected"},{"version":"9.19.1.28","status":"affected"},{"version":"9.19.1.31","status":"affected"},{"version":"9.20.1","status":"affected"},{"version":"9.20.1.5","status":"affected"},{"version":"9.20.2","status":"affected"},{"version":"9.20.2.10","status":"affected"},{"version":"9.20.2.21","status":"affected"}]},{"vendor":"cisco","product":"firepower_threat_defense_software","defaultStatus":"unknown","cpes":["cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:*"],"versions":[{"version":"7.2.0","status":"affected"},{"version":"7.2.0.1","status":"affected"},{"version":"7.2.1","status":"affected"},{"version":"7.2.2","status":"affected"},{"version":"7.2.3","status":"affected"},{"version":"7.2.4","status":"affected"},{"version":"7.2.4
Added
SSVC
{"timestamp":"2024-10-24T15:12:42.668413Z","id":"CVE-2024-20426","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}
CVE Modified by Cisco Systems, Inc.
6/17/2026 3:07:00 AM
Action
Type
Old Value
New Value
Added
Affected
Record truncated, showing 2048 of 2456 characters.
View Entire Change Record [{"vendor":"Cisco","product":"Cisco Adaptive Security Appliance (ASA) Software","versions":[{"version":"9.18.1","status":"affected"},{"version":"9.18.1.3","status":"affected"},{"version":"9.18.2","status":"affected"},{"version":"9.18.2.5","status":"affected"},{"version":"9.18.2.7","status":"affected"},{"version":"9.18.2.8","status":"affected"},{"version":"9.18.3","status":"affected"},{"version":"9.18.3.39","status":"affected"},{"version":"9.18.3.46","status":"affected"},{"version":"9.18.3.53","status":"affected"},{"version":"9.18.3.55","status":"affected"},{"version":"9.18.3.56","status":"affected"},{"version":"9.18.4","status":"affected"},{"version":"9.18.4.5","status":"affected"},{"version":"9.18.4.8","status":"affected"},{"version":"9.18.4.22","status":"affected"},{"version":"9.18.4.24","status":"affected"},{"version":"9.18.4.29","status":"affected"},{"version":"9.19.1","status":"affected"},{"version":"9.19.1.5","status":"affected"},{"version":"9.19.1.9","status":"affected"},{"version":"9.19.1.12","status":"affected"},{"version":"9.19.1.18","status":"affected"},{"version":"9.19.1.22","status":"affected"},{"version":"9.19.1.24","status":"affected"},{"version":"9.19.1.27","status":"affected"},{"version":"9.19.1.28","status":"affected"},{"version":"9.19.1.31","status":"affected"},{"version":"9.20.1","status":"affected"},{"version":"9.20.1.5","status":"affected"},{"version":"9.20.2","status":"affected"},{"version":"9.20.2.10","status":"affected"},{"version":"9.20.2.21","status":"affected"}]},{"vendor":"Cisco","product":"Cisco Firepower Threat Defense Software","versions":[{"version":"7.2.0","status":"affected"},{"version":"7.2.0.1","status":"affected"},{"version":"7.2.1","status":"affected"},{"version":"7.2.2","status":"affected"},{"version":"7.2.3","status":"affected"},{"version":"7.2.4","status":"affected"},{"version":"7.2.4.1","status":"affected"},{"version":"7.2.5","status":"affected"},{"version":"7.2.5.1","status":"affected"},{"version":"7.2.6","status":"affected"},{"version":"7.2.7","status":"affected"},{"ve
Initial Analysis by NIST
11/05/2024 2:43:16 PM
Action
Type
Old Value
New Value
Added
CVSS V3.1
NIST AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Added
CWE
NIST NVD-CWE-noinfo
Added
CPE Configuration
OR
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.0:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.0.1:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.1:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.2:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.3:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.4:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.4.1:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.5:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.5.1:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.5.2:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.6:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.7:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.8:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.8.1:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.3.0:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.3.1:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.3.1.1:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.3.1.2:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.4.0:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.4.1:*:*:*:*:*:*:*
*cpe:2.3:a:cisco:firepower_threat_defense_software:7.4.1.1:*:*:*:*:*:*:*
Added
CPE Configuration
Record truncated, showing 2048 of 2711 characters.
View Entire Change Record OR
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.1:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.1.3:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.2:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.2.5:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.2.7:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.2.8:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.3:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.3.39:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.3.46:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.3.53:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.3.55:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.3.56:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.4:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.4.5:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.4.8:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.4.22:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.4.24:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.4.29:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.5:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.9:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.12:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.18:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.22:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.24:*:*:*:*
Changed
Reference Type
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ikev2-dos-9FgEyHsF No Types Assigned
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ikev2-dos-9FgEyHsF Vendor Advisory
New CVE Received from Cisco Systems, Inc.
10/23/2024 2:15:10 PM
Action
Type
Old Value
New Value
Added
Description
A vulnerability in the Internet Key Exchange version 2 (IKEv2) protocol for VPN termination of 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 is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted IKEv2 traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
Added
CVSS V3.1
Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Added
CWE
Cisco Systems, Inc. CWE-476
Added
Reference
Cisco Systems, Inc. https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ikev2-dos-9FgEyHsF [No types assigned]
Quick Info
CVE Dictionary Entry: CVE-2024-20426 NVD
Published Date: 10/23/2024 NVD
Last Modified: 08/11/2026
Source: Cisco Systems, Inc.
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