CVE-2021-1730 MEDIUM

CVE-2021-1730: Microsoft Exchange Server Spoofing Vulnerability

Vendor Microsoft
Product Microsoft Exchange Server 2019 Cumulative Update 7
Published February 25, 2021
Last update August 3, 2024

CVSS base score

5.4/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C

What the vulnerability does

01Description

<p>A spoofing vulnerability exists in Microsoft Exchange Server which could result in an attack that would allow a malicious actor to impersonate the user.</p> <p>This update addresses this vulnerability.</p> <p>To prevent these types of attacks, Microsoft recommends customers to download inline images from different DNSdomains than the rest of OWA. Please see further instructions in the FAQ to put in place this mitigations.</p>

Key dates

02Disclosure timeline

February 25, 2021 CVE published
August 3, 2024 Record updated