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I. Basic Information for CVE-2025-20134
Vulnerability Information

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Vulnerability Title
Cisco Adaptive Security Appliance and Firepower Threat Defense Software SSL/TLS Certificate Denial of Service Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in the certificate processing of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper parsing of SSL/TLS certificates. An attacker could exploit this vulnerability by sending crafted DNS packets that match a static Network Address Translation (NAT) rule with DNS inspection enabled through an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
双重释放
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Secure Firewall Adaptive Security Appliance和Cisco Secure Firewall Threat Defense都是美国思科(Cisco)公司的产品。Cisco Secure Firewall Adaptive Security Appliance是一个企业级防火墙软件。Cisco Secure Firewall Threat Defense是一个集成式防火墙平台。 Cisco Secure Firewall Adaptive Security
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
CiscoCisco Adaptive Security Appliance (ASA) Software 9.12.4.39 -
CiscoCisco Firepower Threat Defense Software 6.6.5.2 -
II. Public POCs for CVE-2025-20134
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III. Intelligence Information for CVE-2025-20134
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IV. Related Vulnerabilities
V. Comments for CVE-2025-20134

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