CVE-2012-0002: Microsoft Windows RDP Memory Handling Flaw Allows Remote Code Execution

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 18 September 2026. Confidence: high.

critical priorityCVSS score of 9.3 and high EPSS probability indicate a severe, remotely exploitable flaw with no authentication required, posing an immediate risk to unpatched systems.

What it is

The RDP implementation in multiple Windows versions fails to properly process packets in memory, allowing access to an object that was not properly initialized or has been deleted. A remote attacker can send crafted RDP packets to trigger this condition and execute arbitrary code. The flaw affects Windows XP, Server 2003, Vista, Server 2008, and Windows 7.

Impact

An unauthenticated remote attacker can execute arbitrary code with system-level privileges on the target machine. This can lead to full compromise of the affected host.

Attack surface

The vulnerability is reachable over the network via the RDP service (typically TCP port 3389). No authentication or user interaction is required, as indicated by the CVSS vector AV:N/AC:M/Au:N.

Exploitation

The CVE is not listed in CISA KEV, but EPSS indicates a high probability of exploitation (0.741, 99.5th percentile). References include a US Government Resource alert and a vendor security bulletin, suggesting active attention.

What to do

• Apply the Microsoft security update MS12-020 immediately on all affected systems.
• Disable RDP if not required, or restrict access to trusted IP addresses via firewall rules.
• Enable Network Level Authentication (NLA) for RDP connections to require authentication before session establishment.
• Monitor for and block anomalous RDP traffic using intrusion detection/prevention systems.
• Upgrade to a supported Windows version that is not affected by this vulnerability.

Detection

• Monitor RDP service logs for unusual connection attempts or crashes (e.g., Event ID 56, 50).
• Use network monitoring to detect crafted RDP packets targeting port 3389.
• Check for unexpected system reboots or RDP service terminations that may indicate exploitation attempts.
• Deploy endpoint detection to flag suspicious process creation originating from RDP sessions.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.