CVE-2018-8581
High 7.4 Exploited in the wild (KEV) Used in ransomware campaigns
Confirmed active exploitation — CISA KEV catalog
- Name
- Microsoft Exchange Server Privilege Escalation Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply updates per vendor instructions.
Description
An elevation of privilege vulnerability exists in Microsoft Exchange Server, aka "Microsoft Exchange Server Elevation of Privilege Vulnerability." This affects Microsoft Exchange Server.
Metrics
- CVSS 3.1
-
7.4 (HIGH)
Score source: NVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - EPSS — exploit probability
- 28% (percentile: 98) as of 1 November 2026
Affected products
microsoft: exchange server
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8581 PatchVendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8581 PatchVendor Advisory
- http://www.securityfocus.com/bid/105837 Broken LinkThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1042141 Broken LinkThird Party AdvisoryVDB Entry
- http://www.securityfocus.com/bid/105837 Broken LinkThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1042141 Broken LinkThird Party AdvisoryVDB Entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018… US Government Resource