CVE-2026-20015
published 2026-03-04CVE-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…
PriorityP336medium5.8CVSS 3.1
AVNACLPRNUINSCCNINAL
EPSS
0.30%
22.2th percentile
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.
Affected
100 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | adaptive_security_appliance_software | >= 9.18.1 < 9.18.4.71 | 9.18.4.71 |
| cisco | adaptive_security_appliance_software | >= 9.19.1 < 9.20.4.10 | 9.20.4.10 |
| cisco | adaptive_security_appliance_software | >= 9.22.1.1 < 9.22.2.13 | 9.22.2.13 |
| cisco | adaptive_security_appliance_software | >= 9.23.1 < 9.23.1.19 | 9.23.1.19 |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
| cisco | cisco_secure_firewall_adaptive_security_appliance_software | — | — |
CVSS provenance
nvdv3.15.8MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
vendor_cisco7.7HIGH
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GHSA
GHSA-m287-fgwg-4xpc: A vulnerability in the IKEv2 feature of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, remote attack
ghsa_unreviewed·2026-03-04
CVE-2026-20015 [MEDIUM] CWE-401 GHSA-m287-fgwg-4xpc: A vulnerability in the IKEv2 feature of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, remote attack
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.
Cisco
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software IKEv2 Denial of Service Vulnerabilities
vendor_cisco·2026-03-05·CVSS 7.7
CVE-2026-20013 [HIGH] CWE-401 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software IKEv2 Denial of Service Vulnerabilities
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software IKEv2 Denial of Service Vulnerabilities
Multiple vulnerabilities in the Internet Key Exchange Version 2 (IKEv2) feature of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow a remote attacker to leak memory when parsing IKEv2 packets, triggering a denial of service (DoS) condition.
For more information about these vulnerabilities, see the Details section of this advisory.
Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.
This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecur
Cisco
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software IKEv2 Denial of Service Vulnerabilities
vendor_cisco·CVSS 3.1
CVE-2026-20015 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software IKEv2 Denial of Service Vulnerabilities
CVE-2026-20015: Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software IKEv2 Denial of Service Vulnerabilities
Multiple vulnerabilities in the Internet Key Exchange Version 2 (IKEv2) feature of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow a remote attacker to leak memory when parsing IKEv2 packets, triggering a denial of service (DoS) condition. For more information about these vulnerabilities, see the
CVSS: 3.1
CWE: CWE-401, CWE-401
Bug IDs: CSCwo49925, CSCwo49926, CSCwq01516, CSCwo49925, CSCwo49926
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-03-04
Published