CVE-2021-34518 : Security Advisory and Response
Learn about CVE-2021-34518, a Remote Code Execution vulnerability impacting Microsoft Excel 2016, Excel 2013 SP1, and Office Web Apps Server 2013 SP1. Understand its impact, affected versions, and mitigation steps.
A detailed overview of the Microsoft Excel Remote Code Execution Vulnerability (CVE-2021-34518) including its impact, technical details, and mitigation steps.
Understanding CVE-2021-34518
This section provides insights into the Microsoft Excel Remote Code Execution Vulnerability (CVE-2021-34518).
What is CVE-2021-34518?
CVE-2021-34518 is a Remote Code Execution vulnerability affecting Microsoft Excel 2016, Excel 2013 Service Pack 1, and Office Web Apps Server 2013 Service Pack 1.
The Impact of CVE-2021-34518
The vulnerability allows attackers to execute malicious code remotely, potentially leading to unauthorized access, data theft, and system compromise.
Technical Details of CVE-2021-34518
Explore the technical aspects of CVE-2021-34518, including the vulnerability description, affected systems, and the exploitation mechanism.
Vulnerability Description
The vulnerability in Microsoft Excel allows remote attackers to execute arbitrary code on the targeted system.
Affected Systems and Versions
- Microsoft Excel 2016: Versions 16.0.0.0 to 16.0.5188.100 are affected on 32-bit and x64-based systems.
- Microsoft Excel 2013 Service Pack 1: Versions 15.0.0.0 to 15.0.5363.1000 are vulnerable on ARM64, 32-bit, and x64-based systems.
- Microsoft Office Web Apps Server 2013 Service Pack 1: Version 15.0.1 is impacted across all platforms.
Exploitation Mechanism
Attackers can exploit this vulnerability by enticing a user to open a specially crafted Excel file, triggering the execution of malicious code.
Mitigation and Prevention
Learn how to mitigate the risks posed by CVE-2021-34518 and safeguard your systems against potential attacks.
Immediate Steps to Take
- Apply security updates provided by Microsoft to patch the vulnerability promptly.
- Exercise caution while opening Excel files from untrusted or unknown sources.
Long-Term Security Practices
- Regularly update Microsoft Excel and related software to stay protected from known vulnerabilities.
- Implement security best practices to minimize the impact of future threats.
Patching and Updates
Stay informed about security bulletins from Microsoft and ensure timely installation of patches to address vulnerabilities.