A remote code execution vulnerability exists in the way Microsoft SharePoint software parses specially crafted email messages. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the system user. An attacker could then install programs; view, change, add, or delete data.
To exploit this vulnerability, an attacker would need to send a specially crafted email to an affected SharePoint server, and then convince the recipient to perform multiple actions while replying to the message.
The security update addresses the vulnerability by correcting how Microsoft SharePoint parses specially crafted email messages.
## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Microsoft SharePoint Enterprise Server 2016 | | [KB4484436](https://patchblox.com/security/data/fix/microsoft/kb4484436.md) | Jul 14, 2020 | | Microsoft | Microsoft SharePoint Foundation 2013 Service Pack 1 | | [KB4484448](https://patchblox.com/security/data/fix/microsoft/kb4484448.md) | Jul 14, 2020 | | Microsoft | Microsoft SharePoint Server 2019 | | [KB4484453](https://patchblox.com/security/data/fix/microsoft/kb4484453.md) | Jul 14, 2020 | --- Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.