CVE-2019-0817

MEDIUMNVD 5.45.4—Trending — 4 sources updated this week

5.4

A spoofing vulnerability exists in Microsoft Exchange Server when Outlook Web Access (OWA) fails to properly handle web requests, aka 'Microsoft Exchange Spoofing Vulnerability'. This CVE ID is unique from CVE-2019-0858.

CVSS v3: 5.4
EG Score: 5.4(medium)
EPSS: 85.0%
KEV: Not listed

Published

April 9, 2019

Last Modified

November 21, 2024

References (2)

secure@microsofthttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0817
af854a3a-2127-422b-91ae-364da2661108https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0817

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-19

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Microsoft MSRCCVE-2019-08172019-04-09
Microsoft Exchange Spoofing Vulnerability

Data Freshness Timeline

(refreshed 12× in last 7d / 18× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 20:44 UTCEG score recompute
2026-05-27 20:44 UTCVendor advisory
2026-05-27 20:44 UTCGHSA enrichment
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-23 04:04 UTCOSV refresh

Frequently asked(5)

What is CVE-2019-0817?

CVE-2019-0817 is a medium vulnerability published on April 9, 2019. A spoofing vulnerability exists in Microsoft Exchange Server when Outlook Web Access (OWA) fails to properly handle web requests, aka 'Microsoft Exchange Spoofing Vulnerability'. This CVE ID is unique from CVE-2019-0858.

When was CVE-2019-0817 disclosed?

CVE-2019-0817 was first published in the National Vulnerability Database on April 9, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2019-0817 actively exploited?

CVE-2019-0817 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 85.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2019-0817?

CVE-2019-0817 has a CVSS v3 base score of 5.4 (NVD).

How do I remediate CVE-2019-0817?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-0817, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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