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CVE-2025-20262— Cisco Nexus 3000 and 9000 Series Switches Protocol Independent Multicast Version 6 Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco NX-OS Software
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco NX-OS Software是美国思科（Cisco）公司的一套交换机使用的数据中心级操作系统软件。 Cisco NX-OS Software存在代码问题漏洞，该漏洞源于PIM6临时数据处理不当，可能导致拒绝服务攻击。

CVSS 5.0 · Medium EPSS 0.35% · P26
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I. Basic Information for CVE-2025-20262

Vulnerability Information
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Vulnerability Title
Cisco Nexus 3000 and 9000 Series Switches Protocol Independent Multicast Version 6 Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the Protocol Independent Multicast Version 6 (PIM6) feature of Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode could allow an authenticated, low-privileged, remote attacker to trigger a crash of the PIM6 process, resulting in a denial of service (DoS) condition. This vulnerability is due to improper processing of PIM6 ephemeral data queries. An attacker could exploit this vulnerability by sending a crafted ephemeral query to an affected device through one of the following methods: NX-API REST, NETCONF, RESTConf, gRPC, or Model Driven Telemetry. A successful exploit could allow the attacker to cause the PIM6 process to crash and restart, causing potential adjacency flaps and resulting in a DoS of the PIM6 and ephemeral query processes.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco NX-OS Software 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco NX-OS Software是美国思科（Cisco）公司的一套交换机使用的数据中心级操作系统软件。 Cisco NX-OS Software存在代码问题漏洞，该漏洞源于PIM6临时数据处理不当，可能导致拒绝服务攻击。
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

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco NX-OS Software 9.2(3) -

II. Public POCs for CVE-2025-20262

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III. Intelligence Information for CVE-2025-20262

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Same Patch Batch · Cisco · 2025-08-27 · 12 CVEs total

CVE-2025-20241 7.4 HIGH Cisco Nexus 3000 and 9000 Series Switches IS-IS Protocol <TBD> Denial of Service Vulnerabi
CVE-2025-20317 7.1 HIGH Cisco UCS Virtual Keyboard Video Monitor (vKVM) Open Redirect Vulnerability
CVE-2025-20294 6.5 MEDIUM Cisco UCS Manager Software Command Injection Vulnerability
CVE-2025-20344 6.5 MEDIUM Cisco Nexus Dashboard Path Traversal Vulnerability
CVE-2025-20295 6.0 MEDIUM Cisco UCS Manager Software Command Injection Vulnerability
CVE-2025-20290 5.5 MEDIUM Cisco NXOS Software Sensitive Log Information Disclosure Vulnerability
CVE-2025-20342 5.4 MEDIUM Cisco Integrated Management Controller Virtual Keyboard Video Monitor (vKVM) Stored Cross-
CVE-2025-20347 5.4 MEDIUM Cisco Nexus Dashboard Fabric Controller Unauthorized REST API Vulnerability
CVE-2025-20348 5.0 MEDIUM Cisco Nexus Dashboard Unauthorized REST API Vulnerability
CVE-2025-20292 4.4 MEDIUM Cisco NXOS Software Command Injection Vulnerability
CVE-2025-20296 Cisco UCS Manager Software Stored Software Stored Cross-Site Scripting Vulnerability

IV. Related Vulnerabilities

Same product: Cisco NX-OS Software
Same vendor: Cisco
Same weakness: CWE-476

V. Comments for CVE-2025-20262

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