Microsoft Office
CVE-2019-1084 — Microsoft Exchange Information Disclosure Vulnerability
Executive Summary
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.
Overview
6.5
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
EPSS Score
0.05328
probability of exploitation in the next 30 days
0.91758 percentile - updated 2026-07-25
View on FIRST.org
Affected Products
1 affected product
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Mail and Calendar Release Notes (Security Update) Release Notes (Security Update) Important Information Disclosure Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft Exchange Server 2010 Service Pack 3 | 4509410 (Security Update) |
Important | Information Disclosure | Maybe |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
4509410 |
Security Update | Maybe |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
References
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