CVE-2021-34451
medium
Microsoft CVSS v3 Base Score
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS Score
1.7%
Exploitation probability in 30 days
Top 26% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Published: July 16, 2021 (1879 days ago)
Last Modified: August 10, 2026
Vendor: Microsoft
Source: NVD
Vulnerability Report
Generated by CyberWatcher
Description
Microsoft Office Online Server Spoofing Vulnerability
CWE
NVD-CWE-noinfoAffected Products
microsoft office online server