A security feature bypass vulnerability exists in Microsoft Outlook software when it improperly handles the parsing of file formats. The security feature bypass by itself does not allow arbitrary code execution. However, to successfully exploit the vulnerability, an attacker would have to use it in conjunction with another vulnerability, such as a remote code execution vulnerability, to take advantage of the security feature bypass vulnerability and run arbitrary code.
To exploit the vulnerability, an attacker would have to convince a user to open a specially crafted file with an affected version of Microsoft Outlook software.
The security update addresses the vulnerability by correcting how Microsoft Outlook handles the parsing of file formats.
## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Microsoft Outlook 2007 Service Pack 3 | | [KB3127890](https://patchblox.com/security/data/fix/microsoft/kb3127890.md) | Apr 11, 2017 | | Microsoft | Microsoft Outlook 2010 Service Pack 2 (32-bit editions) | | [KB3118388](https://patchblox.com/security/data/fix/microsoft/kb3118388.md) | Apr 11, 2017 | | Microsoft | Microsoft Outlook 2010 Service Pack 2 (64-bit editions) | | [KB3118388](https://patchblox.com/security/data/fix/microsoft/kb3118388.md) | Apr 11, 2017 | | Microsoft | Microsoft Outlook 2013 Service Pack 1 (32-bit editions) | | [KB3172519](https://patchblox.com/security/data/fix/microsoft/kb3172519.md) | Apr 11, 2017 | | Microsoft | Microsoft Outlook 2013 Service Pack 1 (64-bit editions) | | [KB3172519](https://patchblox.com/security/data/fix/microsoft/kb3172519.md) | Apr 11, 2017 | | Microsoft | Microsoft Outlook 2016 (32-bit edition) | | [KB3178664](https://patchblox.com/security/data/fix/microsoft/kb3178664.md) | Apr 11, 2017 | | Microsoft | Microsoft Outlook 2016 (64-bit edition) | | [KB3178664](https://patchblox.com/security/data/fix/microsoft/kb3178664.md) | Apr 11, 2017 | --- Data as of 2026-11-08T13:06:02Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo Free to use with attribution: show "Data: Patchblox Patch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.