Overview
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.
https://nvd.nist.gov/vuln/detail/CVE-2018-8581
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2018-8581 |
| Vendor / Product | Microsoft — Exchange Server |
| NVD Published | 2018-11-14 |
| NVD Last Modified | 2025-10-28 |
| CVSS 3.1 Score | 7.4 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| Severity | HIGH |
| CISA KEV Added | 2022-03-03 |
| CISA KEV Deadline | 2022-03-17 |
| Known Ransomware Use | ⚠️ Yes |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Required Action
CISA BOD 22-01 Deadline: 2022-03-17.
Apply updates per vendor instructions.
Timeline
| Date | Event |
|---|---|
| 2022-03-03 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2022-03-17 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2018-8581 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |