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CVE-2025-20281— Cisco ISE API Unauthenticated Remote Code Execution Vulnerability

Quick assessment

Affected
Cisco Cisco Identity Services Engine Software
Exploitation
Confirmed exploitation in the wild; remediate immediately
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存在注入漏洞，该漏洞源于输入验证不足，可能导致执行任意代码。

CVSS 10.0 · Critical KEV EPSS 97.60% · P100

Public Exploits 1

Nuclei · 1 CVE-2025-20281.yaml [template]
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I. Basic Information for CVE-2025-20281

Vulnerability Information
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Vulnerability Title
Cisco ISE API Unauthenticated Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in a specific API of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to execute arbitrary code on the underlying operating system as root. The attacker does not require any valid credentials to exploit this vulnerability. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by submitting a crafted API request. A successful exploit could allow the attacker to obtain root privileges on an affected device.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco ISE和Cisco ISE-PIC 注入漏洞
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存在注入漏洞，该漏洞源于输入验证不足，可能导致执行任意代码。
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 3.3.0 -

II. Public POCs for CVE-2025-20281

# POC Description Source Link Shenlong Link
1 Unauthenticated Python PoC for CVE-2025-20281 RCE against ISE ERS API https://github.com/abrewer251/CVE-2025-20281-2-Cisco-ISE-RCE POC Details
2 This script checks for the presence of the **CVE-2025-20281** vulnerability in Cisco Identity Services Engine (ISE) and ISE-PIC, which allows **unauthenticated remote code execution (RCE)** as root due to insufficient input validation in a specific API. https://github.com/grupooruss/CVE-2025-20281-Cisco POC Details
3 Unauthenticated Remote Code Execution exploit for CVE-2025-20281 in Cisco ISE ERS API. Execute commands or launch reverse shells as root — no authentication required. https://github.com/ill-deed/Cisco-CVE-2025-20281-illdeed POC Details
4 CVE-2025-20281 https://github.com/B1ack4sh/Blackash-CVE-2025-20281 POC Details
5 A vulnerability in a specific API of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to execute arbitrary code on the underlying operating system as root. The attacker does not require any valid credentials to exploit this vulnerability. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by submitting a crafted API request. A successful exploit could allow the attacker to obtain root privileges on an affected device. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-20281.yaml POC Details
6 CVE-2025-20281 https://github.com/Ashwesker/Blackash-CVE-2025-20281 POC Details
7 CVE-2025-20281 https://github.com/Ashwesker/Ashwesker-CVE-2025-20281 POC Details
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III. Intelligence Information for CVE-2025-20281

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Same Patch Batch · Cisco · 2025-06-25 · 3 CVEs total

CVE-2025-20282 10.0 CRITICAL Cisco ISE API Unauthenticated Remote Code Execution Vulnerability
CVE-2025-20264 6.4 MEDIUM Cisco Identity Services Engine Authorization Bypass Vulnerability

IV. Related Vulnerabilities

Same product: Cisco Identity Services Engine Software
Same vendor: Cisco
Same weakness: CWE-74

V. Comments for CVE-2025-20281

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