CVE-2018-0849 Memory corruption in Equation Editor

What is CVE-2018-0849?

CVE-2018-0849 is a high-severity memory corruption vulnerability in Microsoft Office, published on 22 Jan 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Equation Editor in Microsoft Office 2003, Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016 allows a remote code execution vulnerability due to the way objects are handled in memory, aka "Microsoft Word Remote Code Execution Vulnerability". This CVE is unique from CVE-2018-0805, CVE-2018-0806, and CVE-2018-0807.

Which versions are affected by CVE-2018-0849?

It affects 3 products.

Products include Microsoft Office, Microsoft Office Compatibility Pack, Microsoft Word.

How do I fix CVE-2018-0849?

No fix has been published for CVE-2018-0849 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2018-0849 being exploited?

There is no known exploitation of CVE-2018-0849 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-rq89-r9ww-4626.