CVE-2019-1084

What it is

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., aka 'Microsoft Exchange Information Disclosure Vulnerability'.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data exposure.

Exploit odds

5.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2019-07-15 19:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 02:27 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 5.3% in the next 30 days (EPSS).
• Severity: 6.5 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2019-07-15 19:15 UTC

Last modified

2026-06-17 02:27 UTC

Exploit probability

5.3% · EPSS, next 30 days

Weakness

CWE-200 · Information exposure

Record status

Modified

Affected

• Microsoft Exchange Server 2010
• Microsoft Exchange Server 2013
• Microsoft Exchange Server 2016
• Microsoft Lync 2013
• Microsoft Lync Basic 2013
• Microsoft Mail And Calendar
• Microsoft Office 2010
• Microsoft Office 2013

Attack profile CVSS 3.0 · 6.5

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2019-1084.md and follow it. Check whether this project is affected by CVE-2019-1084. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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