CVE-2021-27053 : Security Advisory and Response
Learn about CVE-2021-27053, a remote code execution vulnerability in Microsoft Excel affecting various Microsoft products. Understand its impacts, affected systems, and mitigation steps.
A remote code execution vulnerability in Microsoft Excel has been identified and published as CVE-2021-27053.
Understanding CVE-2021-27053
This vulnerability affects various Microsoft products, allowing an attacker to execute arbitrary code remotely.
What is CVE-2021-27053?
The CVE-2021-27053 relates to a remote code execution vulnerability in Microsoft Excel that poses a significant security risk.
The Impact of CVE-2021-27053
With a base severity level of HIGH and a CVSS score of 7.8, this vulnerability can lead to unauthorized remote code execution and compromise system integrity.
Technical Details of CVE-2021-27053
The following are technical details regarding the CVE-2021-27053 vulnerability:
Vulnerability Description
The vulnerability allows attackers to execute malicious code remotely, potentially leading to system compromise and data breaches.
Affected Systems and Versions
- Microsoft Office 2019 version 19.0.0 on 32-bit and x64-based Systems
- Microsoft Office Online Server version 16.0.1
- Microsoft 365 Apps for Enterprise version 16.0.1
- Microsoft Excel 2016 version 16.0.0.0
- Microsoft Excel 2010 Service Pack 2 version 13.0.0.0
- Microsoft Excel 2013 Service Pack 1 version 15.0.0.0 on ARM64-based, 32-bit, and x64-based Systems
- Microsoft Office Web Apps Server 2013 Service Pack 1 version 15.0.1
Exploitation Mechanism
The vulnerability can be exploited by enticing a user to open a specially crafted Excel file, triggering the execution of arbitrary code.
Mitigation and Prevention
To safeguard your systems against CVE-2021-27053, consider the following measures:
Immediate Steps to Take
- Ensure that security patches are applied promptly to affected systems.
- Exercise caution when opening Excel files from unknown or untrusted sources.
Long-Term Security Practices
- Implement regular security updates and monitor for any unusual system behavior.
- Educate users on the risks of opening files from unverified sources.
Patching and Updates
Refer to official security releases from Microsoft to download and apply the necessary patches to address this vulnerability.