CVE-2019-0817

5.4 mediumEPSS 2.3%

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.

Severity

CVSS 3.1

5.4 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

EPSS: 2.3% chance of exploitation in the next 30 days; higher than 83% of CVEs (scores of 2026-10-31)
CWE: CWE-19
Published: 2019-04-09
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

microsoft:exchange_server

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0817
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0817

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