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CVE record · CVE-2018-8581

Microsoft Exchange Server: An elevation of privilege vulnerability exists in Microsoft Exchange Server…

CVSS 7.4 HighCriticalIn CISA KEV · ransomwareEPSS 0.28 · 98th percentile

Critical, because:

  • In CISA’s KEV catalogue since 3 Mar 2022: it is known to be exploited.
  • CVSS score 7.4 (7.0 or more) and EPSS 0.28 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical

Published by the CVE Program (CNA: microsoft) at 14 Nov 2018, 01:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Microsoft Microsoft Exchange Server
  • affected 2010
  • affected 2013
  • affected 2016
  • affected 2019
Identifiers
CVE-2018-8581
CNA
microsoft
Tags
Published
14 Nov 2018
Updated
21 Oct 2025

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.4 High 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N ADP (CISA-ADP)
  • CISA KEV Listed since 3 Mar 2022: known to be exploited. CISA reports use in ransomware campaigns.
  • EPSS 0.28, the 98th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 14 Nov 2018. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.