CVE-2022-21840 : What You Need to Know
Get detailed insights into CVE-2022-21840, a Remote Code Execution vulnerability in Microsoft Office affecting multiple products like SharePoint Server and Excel. Learn about impacts, affected systems, and mitigation steps.
A Remote Code Execution Vulnerability in Microsoft Office was made public on January 11, 2022. This CVE affects multiple Microsoft products, including SharePoint Server, Excel, Office, and more.
Understanding CVE-2022-21840
This section delves into the details of the CVE-2022-21840 vulnerability and its impact on various Microsoft products.
What is CVE-2022-21840?
The CVE-2022-21840 vulnerability is classified as a Remote Code Execution flaw and poses a high severity risk with a CVSS base score of 8.8.
The Impact of CVE-2022-21840
The impact of this vulnerability allows attackers to execute arbitrary code on affected systems, potentially leading to complete system compromise.
Technical Details of CVE-2022-21840
Here we explore the technical aspects of the CVE, including the description of the vulnerability, affected systems, and exploitation mechanism.
Vulnerability Description
The vulnerability allows remote attackers to execute code on the affected systems, compromising their security and integrity.
Affected Systems and Versions
- Microsoft SharePoint Enterprise Server 2016 (Version: 16.0.0, Less than: 16.0.5266.1000)
- Microsoft SharePoint Enterprise Server 2013 Service Pack 1 (Version: 15.0.0, Less than: 15.0.5415.1000)
- Microsoft Excel 2016 (Version: 16.0.0.0, Less than: 16.0.5266.1000)
- And more
Exploitation Mechanism
Attackers can exploit this vulnerability by sending malicious requests to the targeted systems, allowing them to execute arbitrary code remotely.
Mitigation and Prevention
In this section, we outline the necessary steps to mitigate the CVE-2022-21840 vulnerability and prevent potential exploitation.
Immediate Steps to Take
- Apply security patches provided by Microsoft immediately
- Monitor for any suspicious activities on the network
Long-Term Security Practices
- Regularly update and patch all Microsoft products
- Implement strong network and endpoint security measures
Patching and Updates
- Refer to Microsoft's security guidance for specific updates related to CVE-2022-21840