CVE-2026-20147 — AI Deep Analysis Summary

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-77** (Command Injection). 🔍 **Flaw**: Inadequate validation of **user input**. Attackers inject malicious commands directly into the system.

Q: Who is affected? (Versions/Components)

🏢 **Affected**: **Cisco Identity Services Engine (ISE)** & **Cisco ISE-PIC**. 📦 **Type**: NAC solutions managing zero-trust access for endpoints/users/devices.

Q: What can hackers do? (Privileges/Data)

💻 **Attacker Actions**: 1️⃣ Execute **Arbitrary Commands** (Full Control). 2️⃣ Cause **Denial of Service** (System Crash). 🔑 **Privilege**: Requires **Authenticated** access.

Q: Is exploitation threshold high? (Auth/Config)

🔒 **Threshold**: **Medium**. ⚠️ **Requirement**: Attacker must be **Authenticated** (PR:L). 🌐 **Vector**: **Network** (AV:N) with **Low Complexity** (AC:L). No user interaction needed (UI:N).

Q: Is there a public Exp? (PoC/Wild Exploitation)

🚫 **Public Exploit**: **None Available**. 📄 **Data**: `pocs` array is empty. No known wild exploitation or public PoC at this time.

Q: How to self-check? (Features/Scanning)

🔍 **Self-Check**: 1️⃣ Verify if running **Cisco ISE** or **ISE-PIC**. 2️⃣ Check for **Input Validation** flaws in custom integrations. 3️⃣ Monitor for unexpected **Command Execution** logs.

Q: Is it fixed officially? (Patch/Mitigation)

🩹 **Official Fix**: **Yes**. 📅 **Published**: 2026-04-15. 🔗 **Ref**: Cisco Security Advisory `cisco-sa-ise-rce-traversal-8bYndVrZ`. Update immediately.

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH**. 📊 **CVSS**: **9.8** (Critical). ⚡ **Action**: Patch immediately. RCE + DoS risk is severe. Do not delay.

Updated May 06, 2026 CVSS 9.9 · Critical

This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis →

Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Cisco ISE & ISE-PIC suffer from **Insufficient Input Validation**. <br>💥 **Consequences**: Allows **Remote Code Execution (RCE)** and **Denial of Service (DoS)**.…

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Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-77** (Command Injection). <br>🔍 **Flaw**: Inadequate validation of **user input**. Attackers inject malicious commands directly into the system.

Q3Who is affected? (Versions/Components)

🏢 **Affected**: **Cisco Identity Services Engine (ISE)** & **Cisco ISE-PIC**. <br>📦 **Type**: NAC solutions managing zero-trust access for endpoints/users/devices.

Q4What can hackers do? (Privileges/Data)

💻 **Attacker Actions**: <br>1️⃣ Execute **Arbitrary Commands** (Full Control). <br>2️⃣ Cause **Denial of Service** (System Crash). <br>🔑 **Privilege**: Requires **Authenticated** access.

Q5Is exploitation threshold high? (Auth/Config)

🔒 **Threshold**: **Medium**. <br>⚠️ **Requirement**: Attacker must be **Authenticated** (PR:L). <br>🌐 **Vector**: **Network** (AV:N) with **Low Complexity** (AC:L). No user interaction needed (UI:N).

Q6Is there a public Exp? (PoC/Wild Exploitation)

🚫 **Public Exploit**: **None Available**. <br>📄 **Data**: `pocs` array is empty. No known wild exploitation or public PoC at this time.

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: <br>1️⃣ Verify if running **Cisco ISE** or **ISE-PIC**. <br>2️⃣ Check for **Input Validation** flaws in custom integrations. <br>3️⃣ Monitor for unexpected **Command Execution** logs.

Q8Is it fixed officially? (Patch/Mitigation)

🩹 **Official Fix**: **Yes**. <br>📅 **Published**: 2026-04-15. <br>🔗 **Ref**: Cisco Security Advisory `cisco-sa-ise-rce-traversal-8bYndVrZ`. Update immediately.

Q9What if no patch? (Workaround)

🚧 **No Patch Workaround**: <br>1️⃣ **Restrict Access**: Limit network access to ISE management interfaces. <br>2️⃣ **Strong Auth**: Enforce MFA and strict credential policies.…

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Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH**. <br>📊 **CVSS**: **9.8** (Critical). <br>⚡ **Action**: Patch immediately. RCE + DoS risk is severe. Do not delay.

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Vulnerability detail Full AI analysis (login) Cisco CWE-77