CVE-2025-20124— Cisco Identity Services Engine Java Deserialization Vulnerability
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I. Basic Information for CVE-2025-20124
Vulnerability Information
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Vulnerability Title
Cisco Identity Services Engine Java Deserialization Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in an API of Cisco ISE could allow an authenticated, remote attacker to execute arbitrary commands as the root user on an affected device. This vulnerability is due to insecure deserialization of user-supplied Java byte streams by the affected software. An attacker could exploit this vulnerability by sending a crafted serialized Java object to an affected API. A successful exploit could allow the attacker to execute arbitrary commands on the device and elevate privileges. Note: To successfully exploit this vulnerability, the attacker must have valid read-only administrative credentials. In a single-node deployment, new devices will not be able to authenticate during the reload time.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
可信数据的反序列化
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco ISE 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco ISE是美国思科（Cisco）公司的一个 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存在代码问题漏洞，该漏洞源于存在API反序列化问题，导致攻击者可以root权限执行任意命令。
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)
Shenlong Deep Dive — AI Deep Analysis
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Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Cisco | Cisco Identity Services Engine Software | 3.0.0 | - | |
| Cisco | Cisco ISE Passive Identity Connector | 3.0.0 | - |
II. Public POCs for CVE-2025-20124
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | A vulnerability in an API of Cisco ISE could allow an authenticated, remote attacker to execute arbitrary commands as the root user on an affected device. This vulnerability is due to insecure deserialization of user-supplied Java byte streams by the affected software. | https://github.com/Yuri08loveElaina/CVE-2025-20124_and_CVE-2025-20125 | POC Details |
| 2 | Esse script explora a vulnerabilidade CVE-2025-20124 — uma falha de Java Deserialization no Cisco ISE (Identity Services Engine) que permite Remote Code Execution (RCE). | https://github.com/137f/Cisco-ISE-3.0---Remote-Code-Execution-RCE- | POC Details |
| 3 | Esse script explora a vulnerabilidade CVE-2025-20124 — uma falha de Java Deserialization no Cisco ISE (Identity Services Engine) que permite Remote Code Execution (RCE). | https://github.com/ftz7/Cisco-ISE-3.0---Remote-Code-Execution-RCE- | POC Details |
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Same Patch Batch · Cisco · 2025-02-05 · 18 CVEs total
| CVE-2025-20125 | 9.1 CRITICAL | Cisco Identity Services Engine Insufficient Authorization Bypass Vulnerability |
| CVE-2025-20175 | 7.7 HIGH | Cisco IOS和Cisco IOS XE 安全漏洞 |
| CVE-2025-20173 | 7.7 HIGH | Cisco IOS和Cisco IOS XE 安全漏洞 |
| CVE-2025-20172 | 7.7 HIGH | Cisco IOS、Cisco IOS XE和Cisco IOS XR 安全漏洞 |
| CVE-2025-20176 | 7.7 HIGH | Cisco IOS和Cisco IOS XE 安全漏洞 |
| CVE-2025-20171 | 7.7 HIGH | Cisco多款产品 安全漏洞 |
| CVE-2025-20170 | 7.7 HIGH | Cisco IOS、Cisco IOS XE和Cisco IOS XR 安全漏洞 |
| CVE-2025-20174 | 7.7 HIGH | Cisco IOS和Cisco IOS XE 安全漏洞 |
| CVE-2025-20169 | 7.7 HIGH | Cisco IOS、Cisco IOS XE和Cisco IOS XR 安全漏洞 |
| CVE-2025-20184 | 6.5 MEDIUM | Cisco Secure Email and Web Manager and Secure Web Appliance Command Injection Vulnerabilit |
| CVE-2025-20179 | 6.1 MEDIUM | Cisco Expressway Series Cross-Site Scripting Vulnerability |
| CVE-2025-20183 | 5.8 MEDIUM | Cisco Secure Web Appliance Range Request Bypass Vulnerability |
| CVE-2025-20205 | 4.8 MEDIUM | Cisco Identity Services Engine Stored Cross-Site Scripting Vulnerability |
| CVE-2025-20204 | 4.8 MEDIUM | Cisco Identity Services Engine Stored Cross-Site Scripting Vulnerability |
| CVE-2025-20180 | 4.8 MEDIUM | Cisco Secure Email and Web Manager and Secure Email Gateway Cross-Site Scripting Vulnerabi |
| CVE-2025-20207 | 4.3 MEDIUM | Cisco Secure Email Gateway, Cisco Secure Email and Web Appliance and Cisco Secure Web Appl |
| CVE-2025-20185 | 3.4 LOW | Cisco Secure Email and Web Manager, Secure Email Gateway, and Secure Web Appliance Privile |
IV. Related Vulnerabilities
Same product: Cisco Identity Services Engine Software
- CVE-2026-20193
Cisco Identity Services Engine Authentication Bypass Vulnera - CVE-2026-20195
Cisco Identity Services Engine Observable Response Discrepan - CVE-2026-20136
Cisco Identity Services Engine Authenticated Privilege Escal - CVE-2026-20180
Cisco Identity Services Engine Multiple Remote Code Executio - CVE-2026-20186
Cisco Identity Services Engine Multiple Authenticated Remote
Same vendor: Cisco
- CVE-2026-20219
Cisco Slido 安全漏洞 - CVE-2026-20034
Cisco Unity Connection Remote Code Execution Vulnerability - CVE-2026-20035
Cisco Unity Connection Server-Side Request Forgery Vulnerabi - CVE-2026-20167
Cisco IoT Field Network Director Remote Device Denial of Ser - CVE-2026-20169
Cisco IoT Field Network Director Command Injection Vulnerabi
Same weakness: CWE-502
- CVE-2026-44126
Insecure deserialization - CVE-2026-5127
User Frontend: AI Powered Frontend Posting, User Directory, - CVE-2026-41586
ObjectInputStream.readObject() without ObjectInputFilter in - CVE-2026-34084
PhpSpreadsheet SSRF and RCE via PHP stream wrappers in IOFac - CVE-2026-7712
MindsDB Pickle pickle.loads deserialization
V. Comments for CVE-2025-20124
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