7.3
High
Exploited
CVE-2021-33766 Microsoft Exchange Server Information Disclosure
Active exploitation observed
· CISA KEV catalogue
Required action
Apply updates per vendor instructions.
Ransomware campaigns
Not observed so far
Weakness
CWE-287
Description
Microsoft Exchange Server Information Disclosure Vulnerability
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Microsoft Exchange Server 2019 Cumulative Update 9 15.02 | 15.02.0 → < 15.02.0858.010 | 15.02.0858.010 |
| Microsoft Exchange Server 2016 Cumulative Update 20 15.01 | 15.01.0 → < 15.01.2242.008 | 15.01.2242.008 |
| Microsoft Exchange Server 2013 Cumulative Update 23 15.00 | 15.00.0 → < 15.00.1497.015 | 15.00.1497.015 |
| Microsoft Exchange Server 2016 Cumulative Update 19 15.01 | 15.01.0 → < 15.01.2176.012 | 15.01.2176.012 |
| Microsoft Exchange Server 2019 Cumulative Update 8 15.02 | 15.02.0 → < 15.02.0792.013 | 15.02.0792.013 |
References
- Microsoft Exchange Server Information Disclosure Vulnerability msrc.microsoft.com
Timeline
- Published
- Added to the KEV catalogue
- Last modified
Other CVEs of Microsoft Exchange Server 2019 Cumulative Update 9
The 14 CVEs of Microsoft Exchange Server 2019 Cumulative Update 9 →
CVE-2021-34523
Microsoft Exchange Server Privilege Escalation Vulnerability
9.0
Critical
CVE-2021-34473
Microsoft Exchange Server Remote Code Execution Vulnerability
9.1
Critical
CVE-2021-33768
Microsoft Exchange Server Elevation of Privilege Vulnerability
8.0
High
CVE-2021-31206
Microsoft Exchange Server Remote Code Execution Vulnerability
7.6
High