Microsoft Exchange Server
CVE-2019-0588 — Microsoft Exchange Information Disclosure Vulnerability
Executive Summary
An information disclosure vulnerability exists when the Microsoft Exchange PowerShell API grants calendar contributors more view permissions than intended. To exploit this vulnerability, an attacker would need to be granted contributor access to an Exchange Calendar by an administrator via PowerShell. The attacker would then be able to view additional details about the calendar that would normally be hidden. The security update addresses the vulnerability by modifying how the Exchange PowerShell API grants permissions to contributors.
Overview
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
EPSS Score
0.04626
probability of exploitation in the next 30 days
0.90512 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
5 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft Exchange Server 2010 Service Pack 3 Update Rollup 25 | 4468742 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Exchange Server 2013 Cumulative Update 21 | 4471389 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Exchange Server 2016 Cumulative Update 10 | 4471389 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Exchange Server 2016 Cumulative Update 11 | 4471389 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Exchange Server 2019 | 4471389 (Security Update) |
Important | Information Disclosure | Maybe |
Patches
2 patches
| Article | Type | Restart |
|---|---|---|
4468742 |
Security Update | Maybe |
4471389 |
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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