Is CVE-2019-0817 being actively exploited?

CVE-2019-0817 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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

CVE-2019-0817 has a CVSS 3.1 base score of 5.4 (MEDIUM).

CVE-2019-0817

MEDIUM · CVSS 5.4EPSS 2.3%EU EUVD

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.

Key facts

CVSS score: 5.4 (v3.1)
Severity: MEDIUM
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Weakness (CWE): CWE-19
EPSS score: 2.3% (83th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2019-1570)
Published: April 9, 2019
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2019-1570 in the EU Vulnerability Database. Last updated in EUVD on August 4, 2024.

View on the EU Vulnerability Database

Affected products

microsoft / exchange server
microsoft / exchange server
microsoft / exchange server
microsoft / exchange server
microsoft / exchange server
microsoft / exchange server

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

Microsoft Exchange Server 2010 SP1 Enterprise (English) 64-bit - Microsoft Corporation - Common Criteria Certificate Number: 2011/72 - archived

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0817(Patch, Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain