CVE-2026-20009— Cisco Secure Firewall Adaptive Security Appliance 安全漏洞

Cisco Secure Firewall Adaptive Security Appliance SSH Partial Private Key Authentication Bypass Vulnerability

A vulnerability in the implementation of the proprietary SSH stack with SSH key-based authentication in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to log in to a Cisco Secure Firewall ASA device and execute commands as a specific user. This vulnerability is due to insufficient validation of user input during the SSH authentication phase. An attacker could exploit this vulnerability by submitting crafted input during SSH authentication to an affected device. A successful exploit could allow the attacker to log in to the device as a specific user without the private SSH key of that user. To exploit this vulnerability, the attacker must possess a valid username and the associated public key. The private key is not required. Notes: Exploitation of this vulnerability does not provide the attacker with root access. The authentication, authorization, and accounting (AAA) configuration command auto-enable is not affected by this vulnerability.  

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

对特殊元素的转义处理不恰当

Cisco Secure Firewall Adaptive Security Appliance 安全漏洞

Cisco Secure Firewall Adaptive Security Appliance是美国思科（Cisco）公司的一个企业级防火墙软件。 Cisco Secure Firewall Adaptive Security Appliance Software存在安全漏洞，该漏洞源于SSH身份验证阶段用户输入验证不足，可能导致未经身份验证的远程攻击者以特定用户身份登录并执行命令。

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