CVE-2026-66309: Improper access control in Azure SQL Database allows an authorized attacker to elevate privileges over a netwo

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CRITICAL 9.1WATCHLISTMITIGATE

CVE-2026-66309 is a critical-severity flaw (CVSS 9.1) affecting azure sql database. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper access control in Azure SQL Database allows an authorized attacker to elevate privileges over a network.

Why this priority

Critical severity
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.9% (top 42%)
CISA exploited list	No
Weakness	CWE-284
Published	2026-08-20
Last modified	2026-10-18

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-10-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-20 22:17 UTCPublished CVE record published
2026-10-18 20:10 UTCUpdated Record last modified

microsoft azure sql database MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy azure-sql-database || rpm -q azure-sql-database || azure-sql-database --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-66309?

azure sql database: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-66309 being exploited?

CVE-2026-66309 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-66309 affect?

CVE-2026-66309 affects azure sql database. Severity is critical (CVSS 9.1). Improper access control in Azure SQL Database allows an authorized attacker to elevate privileges over a network.

How urgent is CVE-2026-66309?

Priority 51/100. Critical severity; On your watchlist

Software pages

Azure vulnerabilities

Related CVEs

CVE-2026-56162 CRITICAL 10.0 MITIGATE Improper authentication in Azure SQL Database allows an unauthorized attacker to elevate privileges over a net
CVE-2026-63522 HIGH 7.8 MITIGATE Incorrect permission assignment for critical resource in Azure SQL Database allows an authorized attacker to e
CVE-2026-68782 CRITICAL 9.9 MITIGATE Improper neutralization of special elements used in an sql command ('sql injection') in Azure SQL Database all
CVE-2026-68789 CRITICAL 9.9 MITIGATE Improper neutralization of special elements used in an sql command ('sql injection') in Azure SQL Database all
CVE-2026-69502 CRITICAL 10.0 MITIGATE Server-side request forgery (ssrf) in Azure SQL Database allows an unauthorized attacker to elevate privileges

References

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