CVE-2021-31198: (Pwn2Own) Microsoft Exchange Server OAB Arbitrary File Write Remote Code Execution Vulnerability
First published: Tue May 11 2021(Updated: )
Microsoft Exchange Server Remote Code Execution Vulnerability
Credit: secure@microsoft.com secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft Exchange Server | =2013-cumulative_update_23 | |
| Microsoft Exchange Server | =2016-cumulative_update_19 | |
| Microsoft Exchange Server | =2016-cumulative_update_20 | |
| Microsoft Exchange Server | =2019-cumulative_update_8 | |
| Microsoft Exchange Server | =2019-cumulative_update_9 | |
| Microsoft Exchange |
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Reference Links
Frequently Asked Questions
What is CVE-2021-31198?
CVE-2021-31198 is a vulnerability in Microsoft Exchange Server that allows remote attackers to execute arbitrary code on affected installations.
What is the severity of CVE-2021-31198?
CVE-2021-31198 has a severity rating of 8.8 (high).
Which versions of Microsoft Exchange Server are affected by CVE-2021-31198?
CVE-2021-31198 affects Microsoft Exchange Server 2013 Cumulative Update 23, 2016 Cumulative Update 19 and 20, and 2019 Cumulative Update 8 and 9.
How can CVE-2021-31198 be exploited?
CVE-2021-31198 can be exploited by bypassing the existing authentication mechanism and exploiting the flaw in the OAB service.
Where can I find more information about CVE-2021-31198?
You can find more information about CVE-2021-31198 on the Microsoft Security Response Center (MSRC) website and the Zero Day Initiative (ZDI) website.
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- canonical/microsoft exchange server
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- version/microsoft exchange server/2016-cumulative_update_19
- version/microsoft exchange server/2016-cumulative_update_20
- version/microsoft exchange server/2019-cumulative_update_8
- version/microsoft exchange server/2019-cumulative_update_9
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