CVE-2026-20180 — AI Deep Analysis Summary

Q: What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Cisco ISE has an input validation flaw. ⚡ **Consequences**: Attackers can execute **arbitrary commands** or cause **Denial of Service (DoS)**. Critical risk to network integrity.

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-22** (Improper Limitation of a Pathname to a Restricted Directory). ❌ **Flaw**: Insufficient **user input validation** allows path traversal or unauthorized access.

Q: Who is affected? (Versions/Components)

🏢 **Affected**: **Cisco Identity Services Engine (ISE)**. 📦 **Product**: Cisco ISE Software. 📅 **Published**: April 15, 2026.

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

💀 **Capabilities**: 1️⃣ **Remote Code Execution (RCE)**: Run arbitrary commands. 2️⃣ **DoS**: Crash the service. 🔑 **Privilege**: Requires at least **Read-Only Admin** credentials.

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

🔓 **Threshold**: **Medium**. ✅ **Auth Required**: Yes (Remote Attacker). 📊 **Level**: Low Privilege (Read-Only Admin). 🌐 **Vector**: Network (AV:N).

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

🚫 **Public Exploit**: **No**. 📝 **PoCs**: None listed in data. 🌍 **Wild Exploitation**: Unconfirmed.

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

🔍 **Self-Check**: 1️⃣ Scan for **Cisco ISE** services. 2️⃣ Verify if accounts have **Read-Only Admin** rights. 3️⃣ Check for **input validation** bypasses in admin interfaces.

Q: What if no patch? (Workaround)

🛑 **No Patch?**: 1️⃣ **Restrict Access**: Limit admin access to trusted IPs. 2️⃣ **Least Privilege**: Remove unnecessary Read-Only Admin accounts. 3️⃣ **WAF**: Block suspicious input patterns.

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH**. ⚠️ **CVSS**: 9.8 (Critical). 🚀 **Action**: Patch immediately. RCE + Auth Required = High Impact.

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 has an input validation flaw. <br>⚡ **Consequences**: Attackers can execute **arbitrary commands** or cause **Denial of Service (DoS)**. Critical risk to network integrity.

Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-22** (Improper Limitation of a Pathname to a Restricted Directory). <br>❌ **Flaw**: Insufficient **user input validation** allows path traversal or unauthorized access.

Q3Who is affected? (Versions/Components)

🏢 **Affected**: **Cisco Identity Services Engine (ISE)**. <br>📦 **Product**: Cisco ISE Software. <br>📅 **Published**: April 15, 2026.

Q4What can hackers do? (Privileges/Data)

💀 **Capabilities**: <br>1️⃣ **Remote Code Execution (RCE)**: Run arbitrary commands. <br>2️⃣ **DoS**: Crash the service. <br>🔑 **Privilege**: Requires at least **Read-Only Admin** credentials.

Q5Is exploitation threshold high? (Auth/Config)

🔓 **Threshold**: **Medium**. <br>✅ **Auth Required**: Yes (Remote Attacker). <br>📊 **Level**: Low Privilege (Read-Only Admin). <br>🌐 **Vector**: Network (AV:N).

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

🚫 **Public Exploit**: **No**. <br>📝 **PoCs**: None listed in data. <br>🌍 **Wild Exploitation**: Unconfirmed.

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: <br>1️⃣ Scan for **Cisco ISE** services. <br>2️⃣ Verify if accounts have **Read-Only Admin** rights. <br>3️⃣ Check for **input validation** bypasses in admin interfaces.

Q8Is it fixed officially? (Patch/Mitigation)

🩹 **Official Fix**: **Yes**. <br>📄 **Reference**: Cisco Security Advisory `cisco-sa-ise-rce-4fverepv`. <br>🔗 **Link**: sec.cloudapps.cisco.com...

Q9What if no patch? (Workaround)

🛑 **No Patch?**: <br>1️⃣ **Restrict Access**: Limit admin access to trusted IPs. <br>2️⃣ **Least Privilege**: Remove unnecessary Read-Only Admin accounts. <br>3️⃣ **WAF**: Block suspicious input patterns.

Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH**. <br>⚠️ **CVSS**: 9.8 (Critical). <br>🚀 **Action**: Patch immediately. RCE + Auth Required = High Impact.

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Vulnerability detail Full AI analysis (login) Cisco CWE-22