CVE-2024-20426

Published Oct 23, 2024 CVSS 3.1 · 8.6 High EPSS < 1% KEV · Not listed

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Cisco

Cisco Adaptive Security Appliance (ASA) Software

affected

Version	Status	Constraints
`9.18.1`	affected	—
`9.18.1.3`	affected	—
`9.18.2`	affected	—
`9.18.2.5`	affected	—
`9.18.2.7`	affected	—
`9.18.2.8`	affected	—
`9.18.3`	affected	—
`9.18.3.39`	affected	—
`9.18.3.46`	affected	—
`9.18.3.53`	affected	—
`9.18.3.55`	affected	—
`9.18.3.56`	affected	—
`9.18.4`	affected	—
`9.18.4.5`	affected	—
`9.18.4.8`	affected	—
`9.18.4.22`	affected	—
`9.18.4.24`	affected	—
`9.18.4.29`	affected	—
`9.19.1`	affected	—
`9.19.1.5`	affected	—
`9.19.1.9`	affected	—
`9.19.1.12`	affected	—
`9.19.1.18`	affected	—
`9.19.1.22`	affected	—
`9.19.1.24`	affected	—
`9.19.1.27`	affected	—
`9.19.1.28`	affected	—
`9.19.1.31`	affected	—
`9.20.1`	affected	—
`9.20.1.5`	affected	—
`9.20.2`	affected	—
`9.20.2.10`	affected	—
`9.20.2.21`	affected	—

Cisco

Cisco Firepower Threat Defense Software

affected

Version	Status	Constraints
`7.2.0`	affected	—
`7.2.0.1`	affected	—
`7.2.1`	affected	—
`7.2.2`	affected	—
`7.2.3`	affected	—
`7.2.4`	affected	—
`7.2.4.1`	affected	—
`7.2.5`	affected	—
`7.2.5.1`	affected	—
`7.2.6`	affected	—
`7.2.7`	affected	—
`7.2.5.2`	affected	—
`7.2.8`	affected	—
`7.2.8.1`	affected	—
`7.3.0`	affected	—
`7.3.1`	affected	—
`7.3.1.1`	affected	—
`7.3.1.2`	affected	—
`7.4.0`	affected	—
`7.4.1`	affected	—
`7.4.1.1`	affected	—

Configuration 1 [-]

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:::::::*
	cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.27:::::::*
	cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.28:::::::*
	cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.31:::::::*
	cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.1:::::::*
	cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.1.5:::::::*
	cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.2:::::::*
	cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.2.10:::::::*
	cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.2.21:::::::*

Configuration 2 [-]

OR	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.0:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.0.1:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.1:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.2:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.3:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.4:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.4.1:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.5:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.5.1:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.5.2:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.6:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.7:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.8:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.8.1:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.0:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.1:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.1.1:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.1.2:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.0:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.1:::::::*
	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.1.1:::::::*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2024-18141	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

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.518% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ikev2-dos-9FgEyHsF

History

Aug 11, 2026 8:00 PM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Cisco secure Firewall Threat Defense
CPEs	cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.0.1:::::::* cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.0:::::::* 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:7.2.4.1:::::::* cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.4:::::::* 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:7.2.5:::::::* 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:7.2.8.1:::::::* cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.8:::::::* cpe:2.3:a:cisco:firepower_threat_defense_software:7.3.0:::::::* 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:7.3.1:::::::* cpe:2.3:a:cisco:firepower_threat_defense_software:7.4.0:::::::* cpe:2.3:a:cisco:firepower_threat_defense_software:7.4.1.1:::::::* cpe:2.3:a:cisco:firepower_threat_defense_software:7.4.1:::::::*	cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.0.1:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.0:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.1:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.2:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.3:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.4.1:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.4:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.5.1:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.5.2:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.5:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.6:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.7:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.8.1:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.2.8:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.0:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.1.1:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.1.2:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.3.1:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.0:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.1.1:::::::* cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.1:::::::*
Vendors & Products		Cisco secure Firewall Threat Defense

Nov 5, 2024 8:00 PM Weaknesses updated. Affected versions updated View changes

Type	Values Removed	Values Added
Weaknesses		NVD-CWE-noinfo
CPEs		cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.0.1:::::::* cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.0:::::::* 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:7.2.4.1:::::::* cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.4:::::::* 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:7.2.5:::::::* 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:7.2.8.1:::::::* cpe:2.3:a:cisco:firepower_threat_defense_software:7.2.8:::::::* cpe:2.3:a:cisco:firepower_threat_defense_software:7.3.0:::::::* 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:7.3.1:::::::* cpe:2.3:a:cisco:firepower_threat_defense_software:7.4.0:::::::* cpe:2.3:a:cisco:firepower_threat_defense_software:7.4.1.1:::::::* cpe:2.3:a:cisco:firepower_threat_defense_software:7.4.1:::::::* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.1.3:::::::* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.18.1:::::::* 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:9.18.2:::::::* 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:9.18.3:::::::* 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:9.18.4.5:::::::* 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:::::::* 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:::::::* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.27:::::::* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.28:::::::* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.19.1.31:::::::* 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:::::::* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.1.5:::::::* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.1:::::::* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.2.10:::::::* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.2.21:::::::* cpe:2.3:o:cisco:adaptive_security_appliance_software:9.20.2:::::::*

Oct 24, 2024 4:15 PM First appearance in the feed. Affected versions updated. Affected vendors updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
First Time appeared		Cisco Cisco adaptive Security Appliance Software Cisco firepower Threat Defense Software
CPEs		cpe:2.3:a:cisco:firepower_threat_defense_software:::::::: cpe:2.3:o:cisco:adaptive_security_appliance_software::::::::
Vendors & Products		Cisco Cisco adaptive Security Appliance Software Cisco firepower Threat Defense Software
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Oct 23, 2024 6:00 PM Description updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values 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.
Weaknesses		CWE-476
References		https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ikev2-dos-9FgEyHsF
Metrics		cvssV3_1 `{'score': 8.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H'}`