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CVE-2025-20191— Multiple Cisco Products Denial of Service Vulnerability

CVSS 7.4 · High EPSS 0.10% · P27
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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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Same Patch Batch · Cisco · 2025-05-07 · 35 CVEs total

CVE-2025-2018810.0 CRITICALCisco IOS XE 信任管理问题漏洞
CVE-2025-201868.8 HIGHCisco IOS XE 操作系统命令注入漏洞
CVE-2025-201828.6 HIGHCisco Adaptive Security Appliance Software, Firepower Threat Defense Software and IOS XE S
CVE-2025-201548.6 HIGHCisco IOS, IOS XE and IOS XR Software TWAMP Denial of Service Vulnerability
CVE-2025-201628.6 HIGHCisco IOS XE 资源管理错误漏洞
CVE-2025-201648.3 HIGHCisco IOS 安全漏洞
CVE-2025-201227.8 HIGHCisco Catalyst SD-WAN Manager Privilege Escalation Vulnerability
CVE-2025-201927.7 HIGHCisco IOS XE 安全漏洞
CVE-2025-202027.4 HIGHCisco IOS XE Wireless Controller Software 安全漏洞
CVE-2025-201897.4 HIGHCisco IOS XE 安全漏洞
CVE-2025-201407.4 HIGHCisco IOS XE 安全漏洞
CVE-2025-202107.3 HIGHCisco Catalyst Center Unprotected API Endpoint
CVE-2025-201976.7 MEDIUMCisco IOS XE 输入验证错误漏洞
CVE-2025-202006.7 MEDIUMCisco IOS XE 代码问题漏洞
CVE-2025-202016.7 MEDIUMCisco IOS XE 代码问题漏洞
CVE-2025-201906.5 MEDIUMCisco IOS XE Wireless Controller Software 访问控制错误漏洞
CVE-2025-201936.5 MEDIUMCisco IOS XE 操作系统命令注入漏洞
CVE-2025-201876.5 MEDIUMCisco SD-WAN Manager Software Arbitrary File Creation Vulnerability
CVE-2025-201556.0 MEDIUMCisco IOS XE 安全漏洞
CVE-2025-201575.9 MEDIUMCisco Catalyst vManage Certificate Validation Vulnerability

Showing top 20 of 35 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco NX-OS Software
Same vendor: Cisco
Same weakness: CWE-805

V. Comments for CVE-2025-20191

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