CVE-2020-1471 in Windows
Summary
by MITRE
<p>An elevation of privilege vulnerability exists when Microsoft Windows CloudExperienceHost fails to check COM objects. An attacker who successfully exploited the vulnerability could gain elevated privileges on a targeted system.</p> <p>To exploit the vulnerability, an attacker would have to log on to an affected system and run a specially crafted script or application.</p> <p>The security update addresses the vulnerability by checking COM objects.</p>
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Analysis
by VulDB Data Team • 02/24/2026
The vulnerability identified as CVE-2020-1471 represents a critical elevation of privilege flaw within Microsoft Windows CloudExperienceHost component. This vulnerability stems from insufficient validation of COM (Component Object Model) objects within the Windows operating system architecture, creating a pathway for malicious actors to escalate their privileges on compromised systems. The CloudExperienceHost service is responsible for managing the Windows 10 welcome experience and various cloud-related functionalities, making it a prime target for attackers seeking persistent system access.
The technical exploitation of this vulnerability requires an attacker to first establish a foothold on the target system through legitimate user authentication, as the flaw cannot be exploited remotely without initial access. Once logged in, the attacker can execute a specially crafted script or application that leverages the improper COM object validation within CloudExperienceHost. This flaw allows malicious code to bypass normal security boundaries and elevate privileges from standard user level to system level, potentially enabling full system compromise and persistent access. The vulnerability specifically relates to the lack of proper object validation during COM method calls, which is a well-documented weakness categorized under CWE-248.
The operational impact of CVE-2020-1471 extends beyond simple privilege escalation, as it provides attackers with the capability to establish persistent backdoors, access sensitive system files, and potentially move laterally within network environments. The vulnerability's exploitation requires minimal network interaction beyond the initial authentication, making it particularly dangerous in environments where user accounts might be compromised through social engineering or credential theft attacks. From an attacker's perspective, this vulnerability aligns with ATT&CK technique T1068 which involves exploiting local system vulnerabilities to gain elevated privileges. The affected Windows versions include Windows 10 and Windows Server 2019, making this vulnerability relevant across enterprise and consumer environments.
Microsoft's security update addresses this vulnerability by implementing proper COM object validation within the CloudExperienceHost service, ensuring that all incoming COM requests undergo rigorous authentication and authorization checks. Organizations should prioritize immediate deployment of this security update across all affected systems, particularly those running Windows 10 and Windows Server 2019 environments. Additional mitigations include implementing application whitelisting policies, restricting user privileges, and monitoring for anomalous COM object usage patterns. The vulnerability demonstrates the critical importance of proper object validation in system services and highlights the need for comprehensive security testing of Windows components that handle inter-process communication. Security teams should also consider implementing endpoint detection and response solutions to identify potential exploitation attempts through behavioral analysis of COM object interactions.