CVE-2026-65770: Microsoft Azure Managed Instance for Apache Cassandra

Azure Managed Instance for Apache Cassandra Remote Code Execution Vulnerability

CVSS 10.0 CriticalCriticalEPSS 0.011 · 64th percentile

Critical, because:

CVSS score 10.0: 9.0 or more.

Published by the CVE Program (CNA: microsoft) at 20 Aug 2026, 21:47 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Microsoft	Azure Managed Instance for Apache Cassandra	affected -

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Azure Managed Instance for Apache Cassandra is affected by an argument injection flaw (improper neutralization of argument delimiters in a command). An unauthorized attacker with network access can execute code on the service. The source gives no affected version range and lists no fix or workaround.

Written 12 Nov 2026.

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
10.0	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C	CNA (microsoft)

CISA KEV Not listed.
EPSS 0.011, the 64th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

20 Aug 2026, 21:47 UTC Confirmed by the CVE List

Sources

References from the CNA

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65770 vendor-advisorypatch

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.