CVE-2026-20049
Description
A vulnerability in the processing of Galois/Counter Mode (GCM)-encrypted Internet Key Exchange version 2 (IKEv2) IPsec traffic of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to the allocation of an insufficiently sized block of memory. An attacker could exploit this vulnerability by sending crafted GCM-encrypted IPsec traffic to an affected device. A successful exploit could allow the attacker to cause an unexpected reload of the device, resulting in a DoS condition. To exploit this vulnerability, the attacker must have valid credentials to establish a VPN connection with the affected device.
CVSS Details
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H Threat Intelligence
Weaknesses 1
Affected Products 8
| Vendor | Product | Version | Range |
|---|---|---|---|
| cisco | adaptive_security_appliance_software | * | ≥9.18.1 – <9.18.4.66 |
| cisco | adaptive_security_appliance_software | * | ≥9.19.1 – <9.20.3.20 |
| cisco | adaptive_security_appliance_software | * | ≥9.22.1.1 – <9.22.2.4 |
| cisco | adaptive_security_appliance_software | * | ≥9.23.1 – <9.23.1.3 |
| cisco | firepower_threat_defense_software | * | ≥7.2.0 – <7.2.11 |
| cisco | firepower_threat_defense_software | * | ≥7.3.0 – <7.4.3 |
| cisco | firepower_threat_defense_software | * | ≥7.6.0 – <7.6.4 |
| cisco | firepower_threat_defense_software | * | ≥7.7.0 – <7.7.10 |
References 1
- sec.cloudapps.cisco.com https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-esp-dos-uv7yD8P5
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.