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CVE-2026-20147— Cisco Identity Services Engine Remote Code Execution Vulnerability

Quick assessment

Affected
Cisco Cisco Identity Services Engine Software
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco ISE和Cisco ISE-PIC都是美国思科（Cisco）公司的产品。Cisco ISE是一个 NAC 解决方案。用于管理零信任架构中的端点、用户和设备对网络资源的访问。Cisco ISE-PIC是一个组件。 Cisco ISE和Cisco ISE-PIC存在安全漏洞，该漏洞源于用户输入验证不足，可能导致经过身份验证的远程攻击者执行任意命令，并可能导致拒绝服务。

CVSS 9.9 · Critical EPSS 10.38% · P96
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I. Basic Information for CVE-2026-20147

Vulnerability Information
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Vulnerability Title
Cisco Identity Services Engine Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root. In single-node ISE deployments, successful exploitation of this vulnerability could cause the affected ISE node to become unavailable, resulting in a denial of service (DoS) condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco ISE和Cisco ISE-PIC 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco ISE和Cisco ISE-PIC都是美国思科（Cisco）公司的产品。Cisco ISE是一个 NAC 解决方案。用于管理零信任架构中的端点、用户和设备对网络资源的访问。Cisco ISE-PIC是一个组件。 Cisco ISE和Cisco ISE-PIC存在安全漏洞，该漏洞源于用户输入验证不足，可能导致经过身份验证的远程攻击者执行任意命令，并可能导致拒绝服务。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco Identity Services Engine Software 3.1.0 -
Cisco Cisco ISE Passive Identity Connector 3.2.0 -

II. Public POCs for CVE-2026-20147

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III. Intelligence Information for CVE-2026-20147

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Vendor Advisories for CVE-2026-20147 (1)

Same Patch Batch · Cisco · 2026-04-15 · 15 CVEs total

CVE-2026-20186 9.9 CRITICAL Cisco Identity Services Engine Multiple Authenticated Remote Code Execution Vulnerability
CVE-2026-20180 9.9 CRITICAL Cisco Identity Services Engine Multiple Remote Code Execution Vulnerability
CVE-2026-20184 9.8 CRITICAL Cisco Webex Meetings Certificate Validation Vulnerability
CVE-2026-20078 6.5 MEDIUM Cisco Unity Connection Arbitrary File Download Vulnerability
CVE-2026-20081 6.5 MEDIUM Cisco Unity Connection Arbitrary File Download Vulnerability
CVE-2026-20170 6.1 MEDIUM Cisco Webex Contact Center 安全漏洞
CVE-2026-20059 6.1 MEDIUM Cisco Unity Connection Reflected Cross-Site Scripting Vulnerability
CVE-2026-20136 6.0 MEDIUM Cisco Identity Services Engine Authenticated Privilege Escalation Vulnerability
CVE-2026-20161 5.5 MEDIUM Cisco ThousandEyes Enterprise Agent Arbitrary File Overwrite Vulnerability
CVE-2026-20152 5.3 MEDIUM Cisco Secure Web Appliance Authentication Service Traffic Bypass Vulnerability
CVE-2026-20148 4.9 MEDIUM Cisco Identity Services Engine Path Traversal Vulnerability
CVE-2026-20132 4.8 MEDIUM Cisco Identity Services Engine Multiple Cross-Site Scripting Vulnerabilities
CVE-2026-20060 4.7 MEDIUM Cisco Unity Connection Open Redirect Vulnerability
CVE-2026-20061 4.3 MEDIUM Cisco Unity Connection SQL Injection Vulnerability

IV. Related Vulnerabilities

Same product: Cisco Identity Services Engine Software
Same vendor: Cisco
Same weakness: CWE-77

V. Comments for CVE-2026-20147

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