CVE-2025-55695
📋 TL;DR
CVE-2025-55695 is an out-of-bounds read vulnerability in Windows WLAN Auto Config Service that allows authenticated local attackers to read memory contents they shouldn't have access to. This could lead to information disclosure of sensitive data from system memory. Only Windows systems with the vulnerable service are affected.
💻 Affected Systems
- Windows WLAN Auto Config Service
📦 What is this software?
Windows 10 1507 by Microsoft
Windows 10 1607 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
An authenticated attacker could read sensitive information from system memory, potentially exposing credentials, encryption keys, or other confidential data that could facilitate further attacks.
Likely Case
Local authenticated users could read limited memory contents, potentially exposing some system information or application data but not full system compromise.
If Mitigated
With proper access controls and monitoring, impact is limited to potential information leakage from the specific service's memory space.
🎯 Exploit Status
Requires local authenticated access and knowledge of memory layout. No public exploit code available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update for specific KB number
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55695
Restart Required: No
Instructions:
1. Apply the latest Windows security updates from Microsoft. 2. For enterprise environments, deploy through WSUS or Microsoft Endpoint Configuration Manager. 3. Verify the update is applied successfully.
🔧 Temporary Workarounds
Disable WLAN Auto Config Service
WindowsDisable the vulnerable service if wireless functionality is not required
sc config WlanSvc start= disabled
sc stop WlanSvc
🧯 If You Can't Patch
- Implement strict access controls to limit local user privileges
- Monitor for unusual service behavior or memory access patterns
🔍 How to Verify
Check if Vulnerable:
Check Windows Update history for the specific KB patch mentioned in Microsoft advisoryCheck Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify the patch is installed via Windows Update or check system version against patched versions in Microsoft advisory📡 Detection & Monitoring
Log Indicators:
- Unusual WLAN Auto Config Service crashes
- Memory access violations in system logs
- Failed service start attempts
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
EventID=1000 OR EventID=1001 with source 'WlanSvc' OR process name containing 'wlansvc'