CVE-2020-0892 in Office
Summary
by MITRE
A remote code execution vulnerability exists in Microsoft Word software when it fails to properly handle objects in memory, aka 'Microsoft Word Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2020-0850, CVE-2020-0851, CVE-2020-0852, CVE-2020-0855.
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Analysis
by VulDB Data Team • 05/11/2025
The vulnerability described in CVE-2020-0892 represents a critical remote code execution flaw within Microsoft Word software that arises from improper handling of memory objects during document processing operations. This vulnerability specifically affects Microsoft Word applications across multiple versions and operating systems, creating a significant attack surface that adversaries can exploit to gain unauthorized control over affected systems. The flaw manifests when the application processes maliciously crafted documents that contain specially constructed objects in memory, leading to unpredictable behavior that can be leveraged for arbitrary code execution. Security researchers identified this issue through extensive analysis of memory management routines within the Word application, particularly focusing on how the software handles various document elements and their associated memory allocations.
The technical root cause of CVE-2020-0892 stems from insufficient input validation and memory safety mechanisms within Microsoft Word's document parsing engine. When processing documents containing malformed or specially crafted objects, the application fails to properly validate memory boundaries and object references, creating conditions where attackers can manipulate memory layout to execute malicious code. This vulnerability falls under the CWE-125 weakness category, which specifically addresses out-of-bounds read conditions that can lead to memory corruption and arbitrary code execution. The flaw operates at the intersection of memory management and document parsing, where legitimate document processing routines are exploited through crafted input that triggers buffer overflows or memory corruption scenarios. Attackers can leverage this vulnerability by enticing victims to open malicious documents through social engineering campaigns, phishing emails, or compromised websites that deliver the malicious payload directly to the victim's system.
The operational impact of CVE-2020-0892 extends beyond simple remote code execution, as successful exploitation can lead to complete system compromise and persistent access for threat actors. Once executed, the malicious code can establish backdoors, escalate privileges, exfiltrate sensitive data, or deploy additional malware components without user interaction. The vulnerability affects organizations of all sizes and industries that rely on Microsoft Word for document processing, making it particularly dangerous in enterprise environments where document sharing and collaboration are common practices. The attack surface is further expanded due to the widespread adoption of Microsoft Word across various platforms and the typical user behavior of opening documents from untrusted sources without proper security validation. Organizations that have not applied the relevant security patches or updates remain highly vulnerable to this attack vector, as the flaw exists in the core document processing functionality that is essential to daily operations.
Mitigation strategies for CVE-2020-0892 focus on immediate patch management and operational security enhancements to reduce the risk of exploitation. Microsoft released security updates that address this vulnerability through enhanced memory validation routines and improved object handling within the Word application. Organizations should prioritize applying these patches immediately and implement additional protective measures such as email filtering, document preview restrictions, and user education about suspicious file attachments. Network-based security controls including firewalls, intrusion detection systems, and web application firewalls can help detect and prevent exploitation attempts by monitoring for known attack patterns associated with this vulnerability. The implementation of principle of least privilege access controls and regular security assessments can further reduce the potential impact if exploitation occurs. Security teams should also monitor for indicators of compromise related to this vulnerability and maintain updated threat intelligence feeds to identify potential exploitation attempts in their environments. The ATT&CK framework categorizes this vulnerability under the T1203 technique for exploitation of remote services, highlighting the need for comprehensive network monitoring and endpoint protection measures to defend against such attacks.