CVE-2023-21761: Microsoft Exchange Server Information Disclosure Vulnerability

Overview

Severity

High (CVSS 7.5)

CVSS Vector

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

Category

Information Disclosure

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2023-Jan

Released

2023-01-10

EPSS Score

12.59% (percentile: 94.0%)

FAQ

What type of information could be disclosed by this vulnerability? The type of information that could be disclosed if an attacker successfully exploited this vulnerability is sensitive information.

Affected Products (3)

Server Software

• Microsoft Exchange Server 2016 Cumulative Update 23
• Microsoft Exchange Server 2019 Cumulative Update 11
• Microsoft Exchange Server 2019 Cumulative Update 12

Security Updates (3)

• 5022143
• 5022193
• 5022193

Acknowledgments

nicolas joly

Revision History

• 2023-01-10: Information published.