CVE-2021-42305: Microsoft Exchange Server Spoofing Vulnerability

Overview

Severity

Medium (CVSS 6.5)

CVSS Vector

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

Category

Spoofing

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2021-Nov

Released

2021-11-09

EPSS Score

24.33% (percentile: 96.1%)

Affected Products (5)

Server Software

• Microsoft Exchange Server 2013 Cumulative Update 23
• 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

Security Updates (5)

• 5007409
• 5007409
• 5007409
• 5007409
• 5007409

Revision History

• 2021-11-09: Information published.