CVE-2025-26633 — AI Deep Analysis Summary

Q: Root Cause? (CWE/Flaw)

🔍 **Root Cause**: **CWE-707** (Improper Abstract Syntax). 🛠️ **Flaw**: The vulnerability lies in how MMC handles specific inputs, allowing malicious `.msc` files to execute code or escalate privileges unexpectedly.

Q: Who is affected? (Versions/Components)

🖥️ **Affected Products**: • Windows Server 2016 (Server Core) • Windows Server 2008 (32-bit, SP2) • Windows 10 Version 1507 (listed in metadata) ⚠️ *Note: Also affects Windows 10/11 per PoC descriptions.*

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

💣 **Public Exploits**: • **Yes**, PoCs are available on GitHub (e.g., `sandsoncosta`, `mbanyamer`). • **Active Threat**: Exploited by **Water Gamayun APT**. • **Type**: EvilTwin `.msc` files causing LPE.

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

🔎 **Self-Check**: • Scan for unpatched MMC versions. • Monitor for suspicious `.msc` file executions. • Check for ActiveX usage in MMC contexts. • Use EDR to detect privilege escalation attempts via MMC.

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH**. • CVSS Score: **7.8** (High). • **Active Exploitation**: Yes, by APT groups. • **Priority**: Patch immediately to prevent privilege escalation and potential system takeover.

Updated May 07, 2026 CVSS 7.0 · High

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Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Microsoft Management Console (MMC) has a security feature bypass flaw.…

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Q2Root Cause? (CWE/Flaw)

🔍 **Root Cause**: **CWE-707** (Improper Abstract Syntax). <br>🛠️ **Flaw**: The vulnerability lies in how MMC handles specific inputs, allowing malicious `.msc` files to execute code or escalate privileges unexpectedly.

Q3Who is affected? (Versions/Components)

🖥️ **Affected Products**: <br>• Windows Server 2016 (Server Core)<br>• Windows Server 2008 (32-bit, SP2)<br>• Windows 10 Version 1507 (listed in metadata)<br>⚠️ *Note: Also affects Windows 10/11 per PoC descriptions.*

Q4What can hackers do? (Privileges/Data)

💀 **Attacker Capabilities**: <br>• **Local Privilege Escalation (LPE)**: Gain admin rights.<br>• **Remote Command Execution**: Via HTML/ActiveX in MMC context.<br>• **Data Access**: High impact on Confidentiality, Integr…

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Q5Is exploitation threshold high? (Auth/Config)

⚖️ **Exploitation Threshold**: <br>• **Access**: Local (AV:L) or Remote via user interaction (UI:R).<br>• **Complexity**: High (AC:H).<br>• **Auth**: None required for local (PR:N), but user interaction often needed.<br>…

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

💣 **Public Exploits**: <br>• **Yes**, PoCs are available on GitHub (e.g., `sandsoncosta`, `mbanyamer`).<br>• **Active Threat**: Exploited by **Water Gamayun APT**.<br>• **Type**: EvilTwin `.msc` files causing LPE.

Q7How to self-check? (Features/Scanning)

🔎 **Self-Check**: <br>• Scan for unpatched MMC versions.<br>• Monitor for suspicious `.msc` file executions.<br>• Check for ActiveX usage in MMC contexts.<br>• Use EDR to detect privilege escalation attempts via MMC.

Q8Is it fixed officially? (Patch/Mitigation)

🛡️ **Official Fix**: <br>• **Yes**, Microsoft released a patch in **March 2025**.<br>• Reference: [Microsoft Security Update Guide](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26633).<br>• **Action**: …

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Q9What if no patch? (Workaround)

🚧 **No Patch Workaround**: <br>• Disable ActiveX in MMC if possible.<br>• Restrict execution of `.msc` files via AppLocker or WDAC.<br>• Limit user privileges to prevent LPE success.<br>• Monitor for unusual MMC processe…

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Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH**.<br>• CVSS Score: **7.8** (High).<br>• **Active Exploitation**: Yes, by APT groups.<br>• **Priority**: Patch immediately to prevent privilege escalation and potential system takeover.

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Vulnerability detail Full AI analysis (login) Microsoft CWE-707