An information disclosure vulnerability exists when the Microsoft Exchange PowerShell API grants calendar contributors more view permission…

published 2019-01-08 7y ago modified 2026-06-17 4mo ago also EUVD-2019-1355

cvss: 6.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 4.6%; EPSS 4.6% chance of exploitation in 30 days, percentile 91%
public exploits: 0; none known

An information disclosure vulnerability exists when the Microsoft Exchange PowerShell API grants calendar contributors more view permissions than intended, aka "Microsoft Exchange Information Disclosure Vulnerability." This affects Microsoft Exchange Server.

Patch / fix

links 1

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0588 advisory

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Exploit prediction

4.63% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	4.0	AV:N/AC:L/Au:S/C:P/I:N/A:N

Affected products

Microsoft Microsoft Exchange Server

Classification

Weakness

CWE-732 Incorrect Permission Assignment for Critical Resource

Technology feeds

Microsoft Exchange rss critical rss

References

portal.msrc.microsoft.com /en-US/security-guidance/advisory/CVE-2019-0588
patch, vendor-advisory
securityfocus.com /bid/106437
vdb-entry, third-party-advisory

Sources

CVE List CVE-2019-0588
NVD CVE-2019-0588

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