CVE-2025-2523 — AI Deep Analysis Summary

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

🚨 **Essence**: Integer Underflow in Honeywell Experion PKS. 💥 **Consequences**: Remote Code Execution (RCE). Critical system compromise.

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-191** (Integer Underflow). ⚠️ **Flaw**: Improper handling of signed/unsigned arithmetic leading to memory corruption.

Q: Who is affected? (Versions/Components)

🏭 **Affected**: Honeywell Experion PKS. 📦 **Versions**: - 520.1 to 520.2 TCU9 - 530 to 530 TCU3 - OneWireless WDM 322.1-322.4, 330.1-330.3

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

👑 **Hacker Power**: Full **Remote Code Execution**. 📂 **Data**: Complete control over the process automation system. High impact on Integrity & Availability.

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

⚡ **Threshold**: **LOW**. 🔓 **Auth**: None required (PR:N). 🌐 **Network**: Remote (AV:N). 👀 **UI**: None needed (UI:N). Easy to exploit!

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

🕵️ **Public Exp?**: **No**. 📄 **PoCs**: Empty list in data. 🌍 **Wild Exp**: Unknown. Currently theoretical but high risk.

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

🔍 **Self-Check**: Scan for **Honeywell Experion PKS** versions listed above. 📡 **Features**: Check for OneWireless WDM components. Verify TCU versions.

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

🛠️ **Official Fix**: **Yes**. 📝 **Patch**: Vendor advisory exists. 🔗 **Ref**: https://process.honeywell.com/ ✅ **Action**: Update to patched versions immediately.

Q: What if no patch? (Workaround)

🚧 **No Patch?**: Isolate network segments. 🚫 **Mitigation**: Restrict access to WDM/TCU interfaces. 👁️ **Monitor**: Watch for anomalous process execution.

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **CRITICAL**. 📊 **CVSS**: High (H/I/H). ⏱️ **Priority**: Patch immediately. RCE risk is severe for industrial control systems.

Updated May 06, 2026 CVSS 9.4 · 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**: Integer Underflow in Honeywell Experion PKS. <br>💥 **Consequences**: Remote Code Execution (RCE). Critical system compromise.

Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-191** (Integer Underflow). <br>⚠️ **Flaw**: Improper handling of signed/unsigned arithmetic leading to memory corruption.

Q3Who is affected? (Versions/Components)

🏭 **Affected**: Honeywell Experion PKS. <br>📦 **Versions**: <br>- 520.1 to 520.2 TCU9 <br>- 530 to 530 TCU3 <br>- OneWireless WDM 322.1-322.4, 330.1-330.3

Q4What can hackers do? (Privileges/Data)

👑 **Hacker Power**: Full **Remote Code Execution**. <br>📂 **Data**: Complete control over the process automation system. High impact on Integrity & Availability.

Q5Is exploitation threshold high? (Auth/Config)

⚡ **Threshold**: **LOW**. <br>🔓 **Auth**: None required (PR:N). <br>🌐 **Network**: Remote (AV:N). <br>👀 **UI**: None needed (UI:N). Easy to exploit!

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

🕵️ **Public Exp?**: **No**. <br>📄 **PoCs**: Empty list in data. <br>🌍 **Wild Exp**: Unknown. Currently theoretical but high risk.

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: Scan for **Honeywell Experion PKS** versions listed above. <br>📡 **Features**: Check for OneWireless WDM components. Verify TCU versions.

Q8Is it fixed officially? (Patch/Mitigation)

🛠️ **Official Fix**: **Yes**. <br>📝 **Patch**: Vendor advisory exists. <br>🔗 **Ref**: https://process.honeywell.com/ <br>✅ **Action**: Update to patched versions immediately.

Q9What if no patch? (Workaround)

🚧 **No Patch?**: Isolate network segments. <br>🚫 **Mitigation**: Restrict access to WDM/TCU interfaces. <br>👁️ **Monitor**: Watch for anomalous process execution.

Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **CRITICAL**. <br>📊 **CVSS**: High (H/I/H). <br>⏱️ **Priority**: Patch immediately. RCE risk is severe for industrial control systems.

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Vulnerability detail Full AI analysis (login) Honeywell CWE-191