ACTIVELY EXPLOITED
CVE-2018-8581: Microsoft Exchange Server Privilege Escalation Vulnerability
| Vendor | Microsoft |
|---|---|
| Product | Exchange Server |
| Actively exploited | Yes |
| Added to CISA KEV | 3 Mar 2022 |
| CISA federal deadline | 17 Mar 2022 |
| Ransomware use | Known |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
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.
SOURCES
Other Microsoft flaws
- patchtuesday:2026-11: Vulnerability in Microsoft
- CVE-2026-124194: Microsoft Office Outlook Missing User Interaction for Potentially Unsafe Action Vulnerability
- CVE-2026-96951: Microsoft Windows Command Injection Vulnerability
- CVE-2026-65660: Microsoft SharePoint Code Injection Vulnerability
- CVE-2026-85880: Microsoft Windows Heap-Based Buffer Overflow Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.