# CVE-2019-1084: Microsoft Exchange Information Disclosure Vulnerability CVE-2019-1084 is fixed in 25 products on 1 platform, first by KB4509410, released July 9, 2019. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2019-1084 - Priority: High - CVSS: n/a (Important) - EPSS: 0.0533 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Jul 9, 2019 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1084 ## Description

An information disclosure vulnerability exists when Exchange allows creation of entities with Display Names having non-printable characters.

An authenticated attacker could exploit this vulnerability by creating entities with invalid display names, which, when added to conversations, remain invisible.

This security update addresses the issue by validating display names upon creation in Microsoft Exchange, and by rendering invalid display names correctly in Microsoft Outlook clients.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Microsoft Exchange Server 2010 Service Pack 3 | | [KB4509410](https://patchblox.com/security/data/fix/microsoft/kb4509410.md) | Jul 9, 2019 | | Microsoft | Microsoft Exchange Server 2013 Cumulative Update 23 | | [KB4509409](https://patchblox.com/security/data/fix/microsoft/kb4509409.md) | Jul 9, 2019 | | Microsoft | Microsoft Exchange Server 2016 Cumulative Update 12 | | [KB4509409](https://patchblox.com/security/data/fix/microsoft/kb4509409.md) | Jul 9, 2019 | | Microsoft | Microsoft Exchange Server 2016 Cumulative Update 13 | | [KB4509409](https://patchblox.com/security/data/fix/microsoft/kb4509409.md) | Jul 9, 2019 | | Microsoft | Microsoft Exchange Server 2019 Cumulative Update 1 | | [KB4509408](https://patchblox.com/security/data/fix/microsoft/kb4509408.md) | Jul 9, 2019 | | Microsoft | Microsoft Exchange Server 2019 Cumulative Update 2 | | [KB4509408](https://patchblox.com/security/data/fix/microsoft/kb4509408.md) | Jul 9, 2019 | | Microsoft | Microsoft Lync 2013 Service Pack 1 (32-bit) | | [KB4475519](https://patchblox.com/security/data/fix/microsoft/kb4475519.md) | Jul 9, 2019 | | Microsoft | Microsoft Lync 2013 Service Pack 1 (64-bit) | | [KB4475519](https://patchblox.com/security/data/fix/microsoft/kb4475519.md) | Jul 9, 2019 | | Microsoft | Microsoft Lync Basic 2013 Service Pack 1 (32-bit) | | [KB4475519](https://patchblox.com/security/data/fix/microsoft/kb4475519.md) | Jul 9, 2019 | | Microsoft | Microsoft Lync Basic 2013 Service Pack 1 (64-bit) | | [KB4475519](https://patchblox.com/security/data/fix/microsoft/kb4475519.md) | Jul 9, 2019 | | Microsoft | Microsoft Office 2013 RT Service Pack 1 | | [KB4464558](https://patchblox.com/security/data/fix/microsoft/kb4464558.md) | Jul 9, 2019 | | Microsoft | Microsoft Office 2013 Service Pack 1 (32-bit editions) | | [KB4464558](https://patchblox.com/security/data/fix/microsoft/kb4464558.md) | Jul 9, 2019 | | Microsoft | Microsoft Office 2013 Service Pack 1 (64-bit editions) | | [KB4464558](https://patchblox.com/security/data/fix/microsoft/kb4464558.md) | Jul 9, 2019 | | Microsoft | Microsoft Office 2016 (32-bit edition) | | [KB4475514](https://patchblox.com/security/data/fix/microsoft/kb4475514.md) | Jul 9, 2019 | | Microsoft | Microsoft Office 2016 (64-bit edition) | | [KB4475514](https://patchblox.com/security/data/fix/microsoft/kb4475514.md) | Jul 9, 2019 | | Microsoft | Microsoft Outlook 2010 Service Pack 2 (32-bit editions) | | [KB4475509](https://patchblox.com/security/data/fix/microsoft/kb4475509.md) | Jul 9, 2019 | | Microsoft | Microsoft Outlook 2010 Service Pack 2 (64-bit editions) | | [KB4475509](https://patchblox.com/security/data/fix/microsoft/kb4475509.md) | Jul 9, 2019 | | Microsoft | Microsoft Outlook 2013 Service Pack 1 (32-bit editions) | | [KB4464592](https://patchblox.com/security/data/fix/microsoft/kb4464592.md) | Jul 9, 2019 | | Microsoft | Microsoft Outlook 2013 Service Pack 1 (64-bit editions) | | [KB4464592](https://patchblox.com/security/data/fix/microsoft/kb4464592.md) | Jul 9, 2019 | | Microsoft | Microsoft Outlook 2016 (32-bit edition) | | [KB4475517](https://patchblox.com/security/data/fix/microsoft/kb4475517.md) | Jul 9, 2019 | | Microsoft | Microsoft Outlook 2016 (64-bit edition) | | [KB4475517](https://patchblox.com/security/data/fix/microsoft/kb4475517.md) | Jul 9, 2019 | | Microsoft | Skype for Business 2016 (32-bit) | | [KB4475545](https://patchblox.com/security/data/fix/microsoft/kb4475545.md) | Jul 9, 2019 | | Microsoft | Skype for Business 2016 (64-bit) | | [KB4475545](https://patchblox.com/security/data/fix/microsoft/kb4475545.md) | Jul 9, 2019 | | Microsoft | Skype for Business 2016 Basic (32-bit) | | [KB4475545](https://patchblox.com/security/data/fix/microsoft/kb4475545.md) | Jul 9, 2019 | | Microsoft | Skype for Business 2016 Basic (64-bit) | | [KB4475545](https://patchblox.com/security/data/fix/microsoft/kb4475545.md) | Jul 9, 2019 | --- Data as of 2026-11-07T18:46:35Z 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.