Affects Azure SQL Database, a widely used cloud database service; network privilege escalation risks broad data loss and control across enterprises.
CVE-2026-66309
Privilege-escalation flaw in Azure SQL Database allowing network-based elevation to admin.
Is CVE-2026-66309 being exploited?
Not confirmed. CVE-2026-66309 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 0.47% probability of exploitation in the next 30 days.
How severe is CVE-2026-66309?
CVE-2026-66309 is rated Critical. 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-2026-66309?
Yes. A fix has been recorded for CVE-2026-66309. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-66309 affect?
CVE-2026-66309 affects Azure SQL Database, Azure SQL Managed Instance, Azure Database services. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-66309?
Apply vendor patch or Azure mitigations immediately; restrict SQL endpoint access and review logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authorized attacker can elevate privileges over the network to obtain admin rights, access/modify/exfiltrate databases and control SQL instances.
Immediate action required