Verification steps (quick)

If ACTIVEWEBCAM appears in the list with an unquoted path, it requires a manual fix. Step 2: Apply the Registry Fix Press Win + R , type , and press Enter.

In the realm of Windows security, one of the most common "low-hanging fruit" vulnerabilities for privilege escalation is the . For users of the legacy surveillance software Active Webcam 115 , this specific misconfiguration once posed a significant risk.

If you are using PowerShell for post-exploitation auditing, the PowerUp script from the PowerSploit framework makes detection trivial: powershell Import-Module .\PowerUp.ps1 Get-ServiceUnquoted Use code with caution.

sc config "Active Webcam" binpath= "\"C:\Program Files\Active Webcam\webcam.exe\"" Use code with caution.

Understanding the Vulnerability: Active Webcam 115 Unquoted Service Path

If a local attacker has write permissions to the root directory ( C:\ ) or the Program Files directory, they can place a malicious executable named Program.exe or Active.exe into those locations. The next time the system boots or the service restarts, Windows executes the attacker's payload under the context of the service's privileges—typically NT AUTHORITY\SYSTEM . Mechanics of Exploitation

The severity of CVE‑2021‑47790 cannot be overstated. An unquoted service path vulnerability that leads to LocalSystem execution has the following consequences:

Active WebCam 11.5 Unquoted Service Path Patched: Securing Windows Privilege Escalation

Security teams should monitor for exploitation attempts:

Because there are spaces and no quotes, Windows attempts to execute files in the following order, appending .exe to the first string before the space: