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I. Basic Information for CVE-2025-20191
Vulnerability Information

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Vulnerability Title
Multiple Cisco Products Denial of Service Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in the Switch Integrated Security Features (SISF) of Cisco IOS Software, Cisco IOS XE Software, Cisco NX-OS Software, and Cisco Wireless LAN Controller (WLC) AireOS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to the incorrect handling of DHCPv6 packets. An attacker could exploit this vulnerability by sending a crafted DHCPv6 packet to 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:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用不正确的长度值访问缓冲区
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco多款产品 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco NX-OS Software等都是美国思科(Cisco)公司的产品。Cisco NX-OS Software是一套交换机使用的数据中心级操作系统软件。Cisco IOS是一套为其网络设备开发的操作系统。Cisco IOS XE是一个操作系统。 Cisco多款产品存在安全漏洞,该漏洞源于DHCPv6包处理不当,可能导致拒绝服务攻击。以下产品受到影响:Cisco IOS、Cisco IOS XE、Cisco NX-OS和Cisco Wireless LAN Controller AireOS。
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 NX-OS Software 8.2(5) -
CiscoCisco Wireless LAN Controller (WLC) 8.10.112.0 -
II. Public POCs for CVE-2025-20191
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III. Intelligence Information for CVE-2025-20191
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IV. Related Vulnerabilities
V. Comments for CVE-2025-20191

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