CVE-2026-20015

A vulnerability in the IKEv2 feature of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device that may impact the availability of services to devices elsewhere in the network. This vulnerability is due to a memory leak when parsing IKEv2 packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device. A successful exploit could allow the attacker to exhaust resources, causing a DoS condition that will eventually require the device to be manually reloaded.

CVSS v3 5.8 MEDIUM

5.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ikev2-dos-eBueGdEG	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:cisco:adaptive_security_appliance_software::::::::
	cpe:2.3:o:cisco:adaptive_security_appliance_software::::::::
	cpe:2.3:o:cisco:adaptive_security_appliance_software::::::::
	cpe:2.3:o:cisco:adaptive_security_appliance_software::::::::

Configuration 2 (hide)

OR	cpe:2.3:a:cisco:secure_firewall_threat_defense::::::::
	cpe:2.3:a:cisco:secure_firewall_threat_defense::::::::
	cpe:2.3:a:cisco:secure_firewall_threat_defense::::::::
	cpe:2.3:a:cisco:secure_firewall_threat_defense::::::::

History

No history.

Information

Published : 2026-03-04 18:16

Updated : 2026-08-11 19:40

NVD link : CVE-2026-20015

Mitre link : CVE-2026-20015

CVE.ORG link : CVE-2026-20015

JSON object : View

Products Affected

cisco

secure_firewall_threat_defense
adaptive_security_appliance_software

CWE

CWE-401

Missing Release of Memory after Effective Lifetime

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"version": "7.4.2.2"}, {"status": "affected", "version": "7.4.2.3"}, {"status": "affected", "version": "7.4.2.4"}, {"status": "affected", "version": "7.6.0"}, {"status": "affected", "version": "7.6.1"}, {"status": "affected", "version": "7.6.2"}, {"status": "affected", "version": "7.6.2.1"}, {"status": "affected", "version": "7.7.0"}]}]}], "published": "2026-03-04T18:16:15.853", "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ikev2-dos-eBueGdEG", "tags": ["Vendor Advisory"], "source": "psirt@cisco.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "psirt@cisco.com", "description": [{"lang": "en", "value": "CWE-401"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability in the IKEv2 feature of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device that may impact the availability of services to devices elsewhere in the network.\r\n\r This vulnerability is due to a memory leak when parsing IKEv2 packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device. A successful exploit could allow the attacker to exhaust resources, causing a DoS condition that will eventually require the device to be manually reloaded."}, {"lang": "es", "value": "Una vulnerabilidad en la funci\u00f3n IKEv2 de Cisco Secure Firewall ASA Software y Cisco Secure FTD Software podr\u00eda permitir a un atacante remoto no autenticado causar una condici\u00f3n DoS en un dispositivo afectado que podr\u00eda impactar la disponibilidad de los servicios a dispositivos en otras partes de la red. Esta vulnerabilidad se debe a una fuga de memoria al analizar paquetes IKEv2. Un atacante podr\u00eda explotar esta vulnerabilidad enviando paquetes IKEv2 manipulados a un dispositivo afectado. Un exploit exitoso podr\u00eda permitir al atacante agotar los recursos, causando una condici\u00f3n DoS que eventualmente requerir\u00e1 que el dispositivo sea recargado manualmente."}], "lastModified": "2026-08-11T19:40:47.230", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3341FE77-F3C2-4CCE-9CAE-4628BBEFA0D3", "versionEndExcluding": "9.18.4.71", "versionStartIncluding": "9.18.1"}, {"criteria": "cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CE667ABD-2044-4C1E-9B75-4AD23BFF82FC", "versionEndExcluding": "9.20.4.10", "versionStartIncluding": "9.19.1"}, {"criteria": "cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6023A38F-7A2D-4DFA-A44A-EBE014EB265F", "versionEndExcluding": "9.22.2.13", "versionStartIncluding": "9.22.1.1"}, {"criteria": "cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FD31C3DC-9DE7-4845-BDC9-9AA38F6D3B64", "versionEndExcluding": "9.23.1.19", "versionStartIncluding": "9.23.1"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "397F1ABE-259C-4BC0-95F2-969D9115FDBB", "versionEndExcluding": "7.2.11", "versionStartIncluding": "7.2.0"}, {"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B3D0EFB8-E018-4732-B99B-9374C1EF602E", "versionEndExcluding": "7.4.3", "versionStartIncluding": "7.3.0"}, {"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7C131685-D69C-4460-BFFC-06DA5AD43038", "versionEndExcluding": "7.6.4", "versionStartIncluding": "7.6.0"}, {"criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "491E1C03-FE39-4A29-82B6-85B85494E57D", "versionEndExcluding": "7.7.11", "versionStartIncluding": "7.7.0"}], "operator": "OR"}]}], "sourceIdentifier": "psirt@cisco.com"}