# CVE-2018-8581: Microsoft Exchange Server Privilege Escalation Vulnerability

> CVE-2018-8581: Microsoft Exchange Server Privilege Escalation Vulnerability. CVSS 7.4 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2018-8581
Last updated: 2025-10-21T23:45:47Z

- Published: 2018-11-14 01:00 UTC · Updated: 2025-10-21 23:45 UTC · Assigner: microsoft
- CVSS: 7.4 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS: 27.4%, 98th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-03-03, federal due date 2022-03-17, ransomware use: Known

## Description

An elevation of privilege vulnerability exists in Microsoft Exchange Server, aka "Microsoft Exchange Server Elevation of Privilege Vulnerability." This affects Microsoft Exchange Server.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Microsoft: Microsoft Exchange Server

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2018-8581)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2018-8581)
- [https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8581](https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8581)
- [http://www.securityfocus.com/bid/105837](http://www.securityfocus.com/bid/105837)
- [http://www.securitytracker.com/id/1042141](http://www.securitytracker.com/id/1042141)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2018-8581 · Markdown: https://rewindex.com/cve/CVE-2018-8581.md · JSON: https://rewindex.com/api/v1/cves/CVE-2018-8581 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:49:23.852Z