CVE-2021-40486 Explained : Impact and Mitigation
Learn about CVE-2021-40486, a Microsoft Word Remote Code Execution Vulnerability affecting various Microsoft products. Find mitigation steps and affected systems here.
Microsoft Word Remote Code Execution Vulnerability was published on October 13, 2021, with a base severity score of 7.8 (High).
Understanding CVE-2021-40486
This CVE details a Remote Code Execution vulnerability affecting various Microsoft products.
What is CVE-2021-40486?
- Vulnerability Type: Remote Code Execution
- CVSS Base Score: 7.8 (High)
- Published Date: October 13, 2021
- Affected Products: Microsoft Office, SharePoint, and Word
The Impact of CVE-2021-40486
The vulnerability allows an attacker to execute arbitrary code on the target system, potentially leading to further compromise.
Technical Details of CVE-2021-40486
This section covers specific technical details of the vulnerability.
Vulnerability Description
- The vulnerability allows remote attackers to execute arbitrary code.
Affected Systems and Versions
- Microsoft SharePoint Enterprise Server 2016: Version 16.0.0 to less than 16.0.5227.1000
- Microsoft SharePoint Enterprise Server 2013 SP1: Version 15.0.0 to less than 15.0.5389.1000
- Microsoft SharePoint Server 2019: Version 16.0.0 to less than 16.0.10379.20000
- Microsoft Office 2019: Version 19.0.0 to less than the security release
- Microsoft Office Online Server: Version 16.0.1 to less than 16.0.10379.20000
- Microsoft Word 2016: Version 16.0.1 to less than 16.0.5227.1000
Exploitation Mechanism
The vulnerability can be exploited by enticing a user to open a maliciously crafted file or visit a compromised website.
Mitigation and Prevention
Protecting systems from the CVE-2021-40486 vulnerability is crucial. Here are some steps to mitigate the risk.
Immediate Steps to Take
- Apply security patches provided by Microsoft for the affected products.
- Avoid opening files or clicking on links from unknown or untrusted sources.
Long-Term Security Practices
- Ensure systems are regularly updated with the latest patches and security releases.
- Conduct security awareness training to educate users on identifying phishing attempts.
Patching and Updates
- Regularly monitor and apply security updates released by Microsoft for the affected products to address the vulnerability.