8.8
High
Exploited
· ransomware
CVE-2023-21529 Microsoft Exchange Server Deserialization of Untrusted Data Vulnerability
Active exploitation observed
· CISA KEV catalogue
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Ransomware campaigns
Known to be used
Weakness
CWE-502
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Microsoft Exchange Server 2019 Cumulative Update 12 15.02 | 15.02.0 → < 15.02.1118.025 | 15.02.1118.025 |
| Microsoft Exchange Server 2019 Cumulative Update 11 15.02 | 15.02.0 → < 15.02.0986.041 | 15.02.0986.041 |
| Microsoft Exchange Server 2013 Cumulative Update 23 15.00 | 15.00.0 → < 15.00.1497.047 | 15.00.1497.047 |
| Microsoft Exchange Server 2016 Cumulative Update 23 15.01 | 15.01.0 → < 15.01.2507.021 | 15.01.2507.021 |
References
- Microsoft Exchange Server Remote Code Execution Vulnerability msrc.microsoft.com
Timeline
- Published
- Added to the KEV catalogue
- Last modified
Other CVEs of Microsoft Exchange Server 2019 Cumulative Update 12
The 40 CVEs of Microsoft Exchange Server 2019 Cumulative Update 12 →
CVE-2023-36035
Microsoft Exchange Server Spoofing Vulnerability
8.0
High
CVE-2023-36039
Microsoft Exchange Server Spoofing Vulnerability
8.0
High
CVE-2023-36050
Microsoft Exchange Server Spoofing Vulnerability
8.0
High
CVE-2023-36439
Microsoft Exchange Server Remote Code Execution Vulnerability
8.0
High