No exploitation reportedFix available

CVE-2019-1373

No exploitation reported by the sources we read.

Published2019-11-12
WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A remote code execution vulnerability exists in Microsoft Exchange through the deserialization of metadata via PowerShell, aka 'Microsoft Exchange Remote Code Execution Vulnerability'.

Timeline

dates in UTC

2019-11-1219:15CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-1373?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-1373?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Microsoft Exchange Server

Branch	Affected	Fixed in	Source
2013.x	= 2013	no fix published	NVD
2016.x	= 2016	no fix published	NVD
2019.x	= 2019	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

portal.msrc.microsoft.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
NVDweakness (CWE)CWE-502read 2026-10-23
FIRST EPSSEPSS score21.7 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2019-11-12
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2019-1373?

A remote code execution vulnerability exists in Microsoft Exchange through the deserialization of metadata via PowerShell, aka 'Microsoft Exchange Remote Code Execution Vulnerability'.

Is CVE-2019-1373 actively exploited?

Active exploitation of CVE-2019-1373 has not been confirmed. Its EPSS score was 21.7% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-1373?

CVE-2019-1373 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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