CVE-2021-33766
high
Microsoft
⚠️ CISA KEV — Exploited in the Wild
CVSS v3 Base Score
7.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS Score
97.5%
Exploitation probability in 30 days
Top 0% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Published: July 14, 2021 (1881 days ago)
Last Modified: August 10, 2026
Vendor: Microsoft
Source: NVD
⚠️ CISA Known Exploited Vulnerability
Added to KEV: 2022-01-18
Remediation Due: 2022-02-01 (⚠ 1680d overdue)
Vulnerability Report
Generated by CyberWatcher
Description
Microsoft Exchange Server Information Disclosure Vulnerability
CWE
NVD-CWE-noinfoAffected Products
microsoft exchange server