CVE-2026-20013

Memory Exhaustion in IKEv2 Causing Remote DoS on Cisco ASA and FTD

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Published Mar 4, 2026 CVSS 3.1 · 5.8 Medium EPSS < 1% KEV · Not listed
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 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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

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History
Type Values Removed Values Added
CPEs cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*
Vendors & Products Cisco firepower Threat Defense Software
Type Values Removed Values Added
First Time appeared 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 firepower Threat Defense Software
Type Values Removed Values Added
Title Memory Exhaustion in IKEv2 Causing Remote DoS on Cisco ASA and FTD
Type Values Removed Values Added
First Time appeared Cisco
Cisco adaptive Security Appliance Software
Cisco secure Firewall Threat Defense
Vendors & Products Cisco
Cisco adaptive Security Appliance Software
Cisco secure Firewall Threat Defense
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}
Type Values Removed Values Added
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 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.
Weaknesses CWE-401
References
Metrics cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L'}
Earlier changes (1)
Weaknesses

Sources

Status
PUBLISHED
Assigner
cisco
Published
Updated
Mar 4, 2026, 9:39 PM
Reserved
Oct 8, 2025, 11:59 AM

View source JSON

Updated
Mar 4, 2026, 9:39 PM

JSON

Status
Analyzed
Published
Mar 4, 2026, 6:16 PM
Modified
Aug 11, 2026, 7:40 PM

View source JSON

No data.

Updated
Apr 16, 2026, 1:30 PM

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