CVE-2021-42321
Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
Required action
Apply updates per vendor instructions.
CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2021-42321
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
Severity
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CAffected Products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 21 | 15.01.0 to <15.01.2308.020 |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 22 | 15.0.0 to <15.01.2375.017 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 10 | 15.02.0 to <15.02.0792.019 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 11 | 15.02.0 to <15.02.0986.014 |
References
4 Links- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42321
- http://packetstormsecurity.com/files/166153/Microsoft-Exchange-Server-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/168131/Microsoft-Exchange-Server-ChainedSerializationBinder-Remote-Code-Execution.html
Record Details
More from Microsoft
Microsoft Remote Desktop Services Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft SharePoint Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.