CVE-2021-27059 Microsoft Office Remote Code Execution

What is CVE-2021-27059?

CVE-2021-27059 is a high-severity code injection vulnerability in Microsoft Office, published on 11 Mar 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

Microsoft Office Remote Code Execution Vulnerability

Which versions are affected by CVE-2021-27059?

It affects 2 products.

Products include Microsoft Office, Microsoft Office 2016.

How do I fix CVE-2021-27059?

No fix has been published for CVE-2021-27059 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 17 Nov 2021.

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

Is CVE-2021-27059 being exploited?

Yes. Attackers have exploited CVE-2021-27059 in the wild since at least 3 Nov 2021.

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-4qxg-56mj-c47p.