CVE-2020-1537 in Windows
Summary
by MITRE
An elevation of privilege vulnerability exists when the Windows Remote Access improperly handles file operations. An attacker who successfully exploited this vulnerability could gain elevated privileges. To exploit the vulnerability, an attacker would first need code execution on a victim system. An attacker could then run a specially crafted application. The security update addresses the vulnerability by ensuring the Windows Remote Access properly handles file operations.
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Analysis
by VulDB Data Team • 02/24/2026
The vulnerability identified as CVE-2020-1537 represents a critical elevation of privilege flaw within the Windows Remote Access functionality that stems from improper file operation handling. This vulnerability resides in the Windows operating system's remote access components, specifically affecting how the system processes file operations during remote access sessions. The flaw creates a pathway for malicious actors to escalate their privileges from standard user level to administrative rights, fundamentally compromising system security and integrity. The vulnerability is particularly concerning because it requires only code execution on the target system to be exploited, making it accessible through various attack vectors including phishing, malicious downloads, or other initial compromise techniques.
The technical nature of this vulnerability aligns with CWE-264, which categorizes improper privilege management issues in software systems. The flaw manifests when Windows Remote Access components fail to properly validate or sanitize file operations, potentially allowing malicious code to manipulate system files or execute unauthorized processes with elevated privileges. Attackers exploiting this vulnerability can leverage the compromised system to gain full administrative control, enabling them to install malicious software, modify system configurations, access sensitive data, or establish persistent backdoors. The exploitation process typically involves running a crafted application that triggers the flawed file operation handling within the Windows Remote Access subsystem, which then permits privilege escalation without proper authentication or authorization checks.
The operational impact of CVE-2020-1537 extends beyond immediate privilege escalation, creating significant risks for enterprise environments where remote access capabilities are frequently utilized. Organizations with remote work policies or systems relying on Windows Remote Access services face heightened exposure to sophisticated attacks that could lead to complete system compromise and data breaches. The vulnerability affects various Windows operating systems including Windows 10, Windows Server 2016, and Windows Server 2019, making it particularly dangerous in enterprise networks where these systems are prevalent. Security researchers have noted that the vulnerability can be leveraged in combination with other attack techniques, potentially allowing attackers to move laterally within networks or establish persistent access through the elevated privileges gained.
Mitigation strategies for CVE-2020-1537 primarily focus on applying the official security update released by Microsoft, which addresses the improper file operation handling within Windows Remote Access components. System administrators should prioritize patch deployment across all affected Windows systems, particularly those with remote access capabilities enabled. Additional protective measures include implementing network segmentation to limit remote access exposure, enabling application whitelisting to prevent execution of unauthorized applications, and monitoring for suspicious file operations or privilege escalation attempts. The vulnerability also aligns with ATT&CK technique T1068, which covers local privilege escalation, and organizations should consider implementing defensive measures such as privilege monitoring, process integrity checks, and endpoint detection and response solutions to detect potential exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify systems that may not have received the necessary patches, as well as to monitor for signs of exploitation attempts that could indicate successful exploitation of this vulnerability.