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Azure Managed Instance for Apache Cassandra Remote Code Execution Vulnerability

CVE-2026-33844 is a remote code execution vulnerability in Azure Managed Instance for Apache Cassandra (rated Critical, CVSS 9.0). Microsoft fixed it in the service; customers need to do nothing.

1 version

Facts

Microsoft id
CVE-2026-33844
Products
Azure Managed Instance for Apache Cassandra
Severity
Critical
Impact
Remote Code Execution
CVSS
9.0
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
Exploited
No
Publicly disclosed
No
Customer action required
No
Release
2026-May
Assigned by
Microsoft
Weakness
CWE-20: Improper Input Validation
MSRC revision
1.0
Status pages
Azure Managed Instance for Apache Cassandra status
First captured by us
(from our first import of this list)
Microsoft last modified
Source
Security updates · open the original at Microsoft

Microsoft's revision notes

  1. Revision 1.0, 2026-05-07: Information published.

Microsoft says

Improper access control in Azure Managed Instance for Apache Cassandra allows an authorized attacker to execute code over a network.

Security updates,

Read Microsoft's full post

What Microsoft changed

One version so far. If Microsoft edits it, each change shows here with what was removed and added.

  1. First version we captured ·

    The text as we first saw it

    Seen by us · Microsoft's timestamp · Microsoft's page

Other changes for Azure Managed Instance for Apache Cassandra

Last updated