Attacker Value
Unknown
(1 user assessed)
Exploitability
Unknown
(1 user assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Network
2

CVE-2021-42321

Disclosure Date: November 10, 2021
Exploited in the Wild
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

Microsoft Exchange Server Remote Code Execution Vulnerability

CVSS V3 Severity and Metrics
Base Score:
8.8 High
Impact Score:
5.9
Exploitability Score:
2.8
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Vendors

  • Microsoft

Products

  • Microsoft Exchange Server 2016 Cumulative Update 21,
  • Microsoft Exchange Server 2019 Cumulative Update 10,
  • Microsoft Exchange Server 2016 Cumulative Update 22,
  • Microsoft Exchange Server 2019 Cumulative Update 11

Exploited in the Wild

Reported by:

Additional Info

Technical Analysis