CVE-2021-31939: Microsoft Excel XLS File Parsing Use-After-Free Remote Code Execution Vulnerability
Microsoft Excel Remote Code Execution Vulnerability
Other sources
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Excel. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of XLS files. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2021-31939?
The severity of CVE-2021-31939 is high with a CVSS score of 7.8.
How does CVE-2021-31939 affect Microsoft Excel?
CVE-2021-31939 allows remote attackers to execute arbitrary code on affected installations of Microsoft Excel.
What is the impact of CVE-2021-31939?
The impact of CVE-2021-31939 is remote code execution, which could lead to unauthorized access, data leakage, or system compromise.
Is user interaction required to exploit CVE-2021-31939?
Yes, user interaction is required to exploit CVE-2021-31939, such as visiting a malicious page or opening a malicious file.
How can I fix CVE-2021-31939?
To fix CVE-2021-31939, it is recommended to apply the latest security updates provided by Microsoft.