A denial of service vulnerability exists in Microsoft Exchange Server software when the software fails to properly handle objects in memory…

published 2019-09-11 7y ago modified 2026-06-17 4mo ago also EUVD-2019-9800

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 6.2%; EPSS 6.2% chance of exploitation in 30 days, percentile 93%
public exploits: 0; none known

A denial of service vulnerability exists in Microsoft Exchange Server software when the software fails to properly handle objects in memory, aka 'Microsoft Exchange Denial of Service Vulnerability'.

Patch / fix

links 1

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1233 advisory

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Exploit prediction

6.18% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	7.8	AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected products

Microsoft Microsoft Exchange Server 2016
Microsoft Microsoft Exchange Server 2019

Classification

Technology feeds

Microsoft Exchange rss critical rss

References

portal.msrc.microsoft.com /en-US/security-guidance/advisory/CVE-2019-1233
patch, vendor-advisory

Sources

CVE List CVE-2019-1233
NVD CVE-2019-1233

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