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CVE-2026-20015

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
04/03/2026
Last modified:
16/04/2026

Description

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.<br /> <br /> 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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L CVSS v3.1 Severity and Metrics:

Base Score: 5.80 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): None
Integrity (I): None
Availability (A): Low

Base Score 3.x
5.80
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.18.1 (including) 9.18.4.71 (excluding)
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.19.1 (including) 9.20.4.10 (excluding)
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.22.1.1 (including) 9.22.2.13 (excluding)
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* 9.23.1 (including) 9.23.1.19 (excluding)
cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:* 7.2.0 (including) 7.2.11 (excluding)
cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:* 7.3.0 (including) 7.4.3 (excluding)
cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:* 7.6.0 (including) 7.6.4 (excluding)
cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:* 7.7.0 (including) 7.7.11 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools