CVE-2021-40486 Microsoft Word Remote Code Execution Vulnerability

What is CVE-2021-40486?

CVE-2021-40486 is a high-severity code injection vulnerability in Microsoft Office, published on 13 Oct 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Microsoft Word Remote Code Execution Vulnerability

Which versions are affected by CVE-2021-40486?

It affects 6 products.

Products include Microsoft Office, Microsoft Office Online Server, Microsoft Office Web Apps Server, Microsoft Sharepoint Enterprise Server, Microsoft Sharepoint Server, Microsoft Word.

How do I fix CVE-2021-40486?

No fix has been published for CVE-2021-40486 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2021-40486 being exploited?

There is no known exploitation of CVE-2021-40486 in the wild and no public exploit code.

Other vulnerabilities in Microsoft Office

• CVE-2018-0798 Microsoft Office Memory Corruption Exploited High 8.8
• CVE-2015-1770 Microsoft Office Uninitialized Memory Use Exploited High 8.8
• CVE-2006-2492 Microsoft Word Malformed Object Pointer Exploited High 8.8
• CVE-2018-0802 Microsoft Office Memory Corruption Exploited High 7.8
• CVE-2017-11882 Microsoft Office Memory Corruption Exploited High 7.8

All Microsoft Office vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-f354-fqf2-9hm4.