CVE-2025-58715
📋 TL;DR
An integer overflow vulnerability in Microsoft Windows Speech components allows authenticated attackers to execute arbitrary code with elevated privileges. This affects Windows systems with speech features enabled, potentially allowing local privilege escalation from standard user accounts to SYSTEM-level access.
💻 Affected Systems
- Microsoft Windows Speech components
📦 What is this software?
Windows 10 1507 by Microsoft
Windows 10 1507 by Microsoft
Windows 10 1607 by Microsoft
Windows 10 1607 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 21h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 11 22h2 by Microsoft
Windows 11 23h2 by Microsoft
Windows 11 24h2 by Microsoft
Windows 11 25h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with SYSTEM privileges, enabling installation of persistent malware, credential theft, and lateral movement across the network.
Likely Case
Local privilege escalation allowing attackers to bypass security controls, install additional malware, and access sensitive system resources.
If Mitigated
Limited impact with proper privilege separation, application control policies, and network segmentation preventing lateral movement.
🎯 Exploit Status
Requires authenticated user access and knowledge of vulnerable speech component interaction; CWE-190 vulnerabilities often require specific input conditions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Specific patch version will be provided in Microsoft Security Update
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-58715
Restart Required: Yes
Instructions:
1. Open Windows Update settings
2. Check for updates
3. Install all security updates
4. Restart system when prompted
🔧 Temporary Workarounds
Disable Windows Speech Recognition
windowsTemporarily disable speech recognition features to mitigate vulnerability
Disable via Control Panel > Ease of Access > Speech Recognition > Turn off speech recognition
Restrict Speech Component Access
windowsUse AppLocker or Windows Defender Application Control to restrict speech component execution
🧯 If You Can't Patch
- Implement least privilege principles - ensure users operate with minimal necessary permissions
- Enable Windows Defender Exploit Guard with Attack Surface Reduction rules
🔍 How to Verify
Check if Vulnerable:
Check Windows Update history for CVE-2025-58715 patch installationCheck Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify patch KB number from Microsoft advisory is installed via 'wmic qfe list' or PowerShell 'Get-HotFix'📡 Detection & Monitoring
Log Indicators:
- Unusual process creation from speech-related executables
- Privilege escalation attempts in Security event logs (Event ID 4672)
Network Indicators:
- Lateral movement attempts following local privilege escalation
SIEM Query:
Process creation where parent_process contains 'speech' or 'sapisvr' and new_process contains privileged commands