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Kaspersky LabKLA12137

HistoryApr 13, 2021 - 12:00 a.m.

KLA12137 Multiple vulnerabilities in Microsoft Exchange Server

2021-04-1300:00:00

Kaspersky Lab

threats.kaspersky.com

10 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:C/I:C/A:C

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.9 High

AI Score

Confidence

High

0.041 Low

EPSS

Percentile

92.2%

JSON

Remote code execution vulnerabilities were found in Microsoft Exchange Server. Malicious users can exploit this vulnerability to execute arbitrary code.

Original advisories

Exploitation

Public exploits exist for this vulnerability.

Malware exists for this vulnerability. Usually such malware is classified as Exploit. More details.

Related products

Microsoft-Exchange-Server

CVE list

CVE-2021-28480 critical

CVE-2021-28482 critical

CVE-2021-28483 critical

CVE-2021-28481 critical

KB list

5001779

Solution

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)

Impacts

Arbitrary code execution. Exploitation of vulnerabilities with this impact can lead to executing by abuser any code or commands at vulnerable machine or process.

Affected Products

Microsoft Exchange Server 2013 Cumulative Update 23Microsoft Exchange Server 2016 Cumulative Update 20Microsoft Exchange Server 2019 Cumulative Update 9Microsoft Exchange Server 2016 Cumulative Update 19Microsoft Exchange Server 2019 Cumulative Update 8