CVE-2026-33109
RCE via improper access control in Azure Cassandra managed instance.
Is CVE-2026-33109 being exploited?
Not confirmed. CVE-2026-33109 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.71% probability of exploitation in the next 30 days.
How severe is CVE-2026-33109?
CVE-2026-33109 is rated Critical with a CVSS score of 9.9. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-33109?
Yes. A fix has been recorded for CVE-2026-33109. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-33109 affect?
CVE-2026-33109 affects Azure Managed Instance for Apache Cassandra. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-33109?
Monitor updates; restrict access; apply patch when available.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution over the network by an authenticated attacker on the Azure Cassandra managed service.
Monitor only