CVE-2021-28454: 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.
— ZDI
Affected Software
Remediation
Event History
Frequently Asked Questions
What is CVE-2021-28454?
CVE-2021-28454 is a vulnerability that allows remote attackers to execute arbitrary code on affected installations of Microsoft Excel.
How can the CVE-2021-28454 vulnerability be exploited?
The CVE-2021-28454 vulnerability can be exploited by visiting a malicious page or opening a malicious file.
What is the severity of CVE-2021-28454?
CVE-2021-28454 has a severity rating of 7.8, which is considered high.
Which versions of Microsoft Excel are affected by CVE-2021-28454?
Microsoft Excel 2013, 2016, and Excel in Office 365 Apps for Enterprise are affected by CVE-2021-28454.
How can I fix CVE-2021-28454?
To fix CVE-2021-28454, apply the available patches and updates provided by Microsoft for the affected versions of Excel.