HIGH

CVE-2018-16793

CVSS v3

8.6

HIGH

EPSS Score

11.3 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2018-16793 yet.

Full record on NVD

Description

Rollup 18 for Microsoft Exchange Server 2010 SP3 and previous versions has an SSRF vulnerability via the username parameter in /owa/auth/logon.aspx in the OWA (Outlook Web Access) login page.

Technical details

Published: 2018-09-21

Frequently asked questions

What is CVE-2018-16793?

Rollup 18 for Microsoft Exchange Server 2010 SP3 and previous versions has an SSRF vulnerability via the username parameter in /owa/auth/logon.aspx in the OWA (Outlook Web Access) login page.

Is CVE-2018-16793 actively exploited?

Active exploitation of CVE-2018-16793 has not been confirmed. Its EPSS score was 11.3% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-16793?

CVE-2018-16793 has a CVSS v3 base score of 8.6 (HIGH severity).

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