Live › vulnerability › CVE-2018-8581
Go to dashboardMicrosoft Exchange Server has a privilege escalation flaw that lets an attacker impersonate any other user on the Exchange server. It is listed in CISA's Known Exploited Vulnerabilities catalog and is tagged as used in ransomware campaigns.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply updates per vendor instructions.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Microsoft Exchange Server | vendor | – | – |
Unknown from the sources.
Apply the Microsoft updates for Exchange Server per vendor instructions, as CISA requires.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
A privilege escalation vulnerability exists in Microsoft Exchange Server. An attacker who successfully exploited this vulnerability could attempt to impersonate any other user of the Exchange server.
CISA required action: Apply updates per vendor instructions.
This page as .md · .json · in your agent: get_signal("CVE-2018-8581")
CISA KEV catalog, Creative Commons 0 · EPSS scores by FIRST, used with attribution · NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.