Attacker Value
Very High
(1 user assessed)
Exploitability
Moderate
(1 user assessed)
User Interaction
Required
Privileges Required
None
Attack Vector
Local
5

CVE-2021-26857

Disclosure Date: March 03, 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 This CVE ID is unique from CVE-2021-26412, CVE-2021-26854, CVE-2021-26855, CVE-2021-26858, CVE-2021-27065, CVE-2021-27078.

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CVSS V3 Severity and Metrics
Base Score:
7.8 High
Impact Score:
5.9
Exploitability Score:
1.8
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
Required
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Vendors

  • Microsoft

Products

  • Microsoft Exchange Server 2016 Cumulative Update 19,
  • Microsoft Exchange Server 2019 Cumulative Update 8,
  • Microsoft Exchange Server 2013,
  • Microsoft Exchange Server 2016 Cumulative Update 14,
  • Microsoft Exchange Server 2019 Cumulative Update 4,
  • Microsoft Exchange Server 2016 Cumulative Update 15,
  • Microsoft Exchange Server 2019 Cumulative Update 5,
  • Microsoft Exchange Server 2019 Cumulative Update 6,
  • Microsoft Exchange Server 2016 Cumulative Update 16,
  • Microsoft Exchange Server 2019 Cumulative Update 7,
  • Microsoft Exchange Server 2016 Cumulative Update 18,
  • Microsoft Exchange Server

Exploited in the Wild

Reported by:
Reported: March 03, 2021 6:38pm UTC (4 months ago)

Additional Info

Technical Analysis