A remote code execution vulnerability exists in Microsoft Project software when it fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could use a specially crafted file to perform actions in the security context of the current user. For example, the file could then take actions on behalf of the logged-on user with the same permissions as the current user.
To exploit the vulnerability, a user must open a specially crafted file with an affected version of Microsoft Project software. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file. In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted file that is designed to exploit the vulnerability. However, an attacker would have no way to force the user to visit the website. Instead, an attacker would have to convince the user to click a link, typically by way of an enticement in an email or Instant Messenger message, and then convince the user to open the specially crafted file.
The security update addresses the vulnerability by correcting how Microsoft Project handles files in memory.
## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Microsoft Project 2010 Service Pack 2 (32-bit editions) | | [KB4022147](https://patchblox.com/security/data/fix/microsoft/kb4022147.md) | Nov 13, 2018 | | Microsoft | Microsoft Project 2010 Service Pack 2 (64-bit editions) | | [KB4022147](https://patchblox.com/security/data/fix/microsoft/kb4022147.md) | Nov 13, 2018 | | Microsoft | Microsoft Project 2013 Service Pack 1 (32-bit editions) | | [KB4461489](https://patchblox.com/security/data/fix/microsoft/kb4461489.md) | Nov 13, 2018 | | Microsoft | Microsoft Project 2013 Service Pack 1 (64-bit editions) | | [KB4461489](https://patchblox.com/security/data/fix/microsoft/kb4461489.md) | Nov 13, 2018 | | Microsoft | Microsoft Project 2016 (32-bit edition) | | [KB4461478](https://patchblox.com/security/data/fix/microsoft/kb4461478.md) | Nov 13, 2018 | | Microsoft | Microsoft Project 2016 (64-bit edition) | | [KB4461478](https://patchblox.com/security/data/fix/microsoft/kb4461478.md) | Nov 13, 2018 | --- Data as of 2026-11-07T12:40:37Z 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