CVE-2019-0858

6.1 mediumEPSS 2.1%

Medium (6.1) in microsoft exchange server. EPSS 2.1% chance of exploitation in the next 30 days.

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-2019-0817.

Severity

CVSS 3.1

6.1 medium

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

EPSS: 2.1% chance of exploitation in the next 30 days; higher than 81% of CVEs (scores of 2026-10-31)
CWE: CWE-79
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-2019-0858
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0858

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