CVE-2025-20271— Cisco Meraki Z和Cisco Meraki MX 安全漏洞

Cisco Meraki MX and Z Series AnyConnect VPN with Client Certificate Authentication Denial of Service Vulnerability

A vulnerability in the Cisco AnyConnect VPN server of Cisco Meraki MX and Cisco Meraki Z Series Teleworker Gateway devices could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition in the Cisco AnyConnect service on an affected device. This vulnerability is due to variable initialization errors when an SSL VPN session is established. An attacker could exploit this vulnerability by sending a sequence of crafted HTTPS requests to an affected device. A successful exploit could allow the attacker to cause the Cisco AnyConnect VPN server to restart, resulting in the failure of all established SSL VPN sessions and forcing remote users to initiate a new VPN connection and re-authenticate. A sustained attack could prevent new SSL VPN connections from being established, effectively making the Cisco AnyConnect VPN service unavailable for all legitimate users.

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

使用未经初始化的变量

Cisco Meraki Z和Cisco Meraki MX 安全漏洞

Cisco Meraki Z和Cisco Meraki MX都是美国思科（Cisco）公司的产品。Cisco Meraki Z是一款企业级防火墙、VPN 网关和路由器。Cisco Meraki MX是一款多功能安全和 SD-WAN 企业设备。 Cisco Meraki Z和Cisco Meraki MX存在安全漏洞，该漏洞源于SSL VPN会话建立期间变量初始化错误，可能导致拒绝服务攻击。

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