CVE-2025-21335 — AI Deep Analysis Summary

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-416** (Use After Free). 🔍 **Flaw**: The Hyper-V NT Kernel Integration VSP mishandles resources. Improper memory management leads to instability and potential code execution.

Q: Who is affected? (Versions/Components)

📦 **Affected Products**: • **Windows 10** Version 21H2 (x64-based) • **Windows 11** Version 22H2 (ARM64-based) • **Windows 11** Version 22H2 (x64-based) 🏢 **Vendor**: Microsoft.

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

💣 **Public Exploit**: **No**. • **PoCs**: None listed in data. • **Wild Exploitation**: Not reported. 📅 **Status**: Patched as of Jan 14, 2025.

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH**. • **CVSS Score**: High (Complete Impact). • **Priority**: Patch immediately. 💡 **Reason**: Local EoP vulnerabilities are often precursors to full system compromise. Do not delay.

Updated May 06, 2026 CVSS 7.8 · High

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**: A critical resource management flaw in **Microsoft Hyper-V**. <br>💥 **Consequences**: Attackers can achieve **Elevation of Privilege (EoP)**.…

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Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-416** (Use After Free). <br>🔍 **Flaw**: The Hyper-V NT Kernel Integration VSP mishandles resources. Improper memory management leads to instability and potential code execution.

Q3Who is affected? (Versions/Components)

📦 **Affected Products**: <br>• **Windows 10** Version 21H2 (x64-based) <br>• **Windows 11** Version 22H2 (ARM64-based) <br>• **Windows 11** Version 22H2 (x64-based) <br>🏢 **Vendor**: Microsoft.

Q4What can hackers do? (Privileges/Data)

⚔️ **Attacker Capabilities**: <br>• **Privileges**: Full **System/Kernel** level access. <br>• **Data**: Complete read/write access to sensitive data.…

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Q5Is exploitation threshold high? (Auth/Config)

🔐 **Exploitation Threshold**: **Low**. <br>• **Attack Vector**: Local (AV:L). <br>• **Complexity**: Low (AC:L). <br>• **Auth Required**: Yes (PR:L).…

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

💣 **Public Exploit**: **No**. <br>• **PoCs**: None listed in data. <br>• **Wild Exploitation**: Not reported. <br>📅 **Status**: Patched as of Jan 14, 2025.

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: <br>1. Verify OS Version (Win 10 21H2 / Win 11 22H2). <br>2. Check for **Hyper-V** role installation. <br>3. Scan for missing **January 2025** security updates. <br>4.…

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Q8Is it fixed officially? (Patch/Mitigation)

✅ **Official Fix**: **Yes**. <br>• **Patch**: Microsoft released the fix on **2025-01-14**. <br>• **Action**: Install the latest cumulative security update for Windows.…

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Q9What if no patch? (Workaround)

🚧 **No Patch Workaround**: <br>1. **Disable Hyper-V** if not needed (removes attack surface). <br>2. **Restrict Local Access**: Limit user accounts with local login rights. <br>3.…

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Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH**. <br>• **CVSS Score**: High (Complete Impact). <br>• **Priority**: Patch immediately. <br>💡 **Reason**: Local EoP vulnerabilities are often precursors to full system compromise. Do not delay.

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Vulnerability detail Full AI analysis (login) Microsoft CWE-416