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CVE-2026-20186— Cisco Identity Services Engine Multiple Authenticated 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 Identity Services Engine（Cisco ISE）是美国思科（Cisco）公司的一款环境感知平台（ISE身份服务引擎）。该平台通过收集网络、用户和设备中的实时信息，制定并实施相应策略来监管网络。 Cisco Identity Services Engine存在安全漏洞，该漏洞源于用户输入验证不足，可能导致至少具有只读管理员凭据的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 5.60% · P93 Updated Apr 18, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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I. Basic Information for CVE-2026-20186

Vulnerability Information

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Vulnerability Title

Cisco Identity Services Engine Multiple Authenticated Remote Code Execution Vulnerability

Source: CVE Program / CVE List V5

Vulnerability Description

A vulnerability in Cisco Identity Services Engine (ISE) 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 at least Read Only Admin 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 these vulnerabilities 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 Identity Services Engine 安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

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	-

II. Public POCs for CVE-2026-20186

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-20186

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Vendor Advisories for CVE-2026-20186 (1)

🔗 Cisco Identity Services Engine Remote Code Execution Vulnerabilities Read full article

https://www.cve.org/CVERecord?id=CVE-2026-20186

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

CVE-2026-20147	9.9 CRITICAL	Cisco Identity Services Engine 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