CVE-2026-20013
Cisco Adaptive Security Appliance (ASA) vulnerability analysis and mitigation

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 also impact the availability of services to devices elsewhere in the network. This vulnerability is due to memory exhaustion caused by not freeing memory during IKEv2 packet processing. 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 manually reload.


SourceNVD

Related Cisco Adaptive Security Appliance (ASA) vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2026-20103HIGH8.6
  • Cisco Adaptive Security Appliance (ASA)Cisco Adaptive Security Appliance (ASA)
  • cpe:2.3:o:cisco:adaptive_security_appliance_software
NoYesMar 04, 2026
CVE-2026-20105HIGH7.7
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CVE-2026-20102MEDIUM6.1
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  • cpe:2.3:o:cisco:adaptive_security_appliance_software
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CVE-2026-20106MEDIUM5.3
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  • cpe:2.3:o:cisco:adaptive_security_appliance_software
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CVE-2026-20021MEDIUM4.3
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  • cpe:2.3:o:cisco:adaptive_security_appliance_software
NoYesMar 04, 2026

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