CVE-2026-66814: Microsoft SQL Server Elevation of Privilege Vulnerability
Published Sep 8, 2026
·Updated
Insufficient granularity of access control in SQL Server allows an authorized attacker to elevate privileges over a network.
Other sources
Microsoft SQL Server Elevation of Privilege Vulnerability
— Microsoft
Affected Software
16 affected componentsFixes available
Microsoft SQL Server 2022 (CU 26)<16.0.4275.2
16.0.4275.2
Microsoft SQL Server 2025 (CU8)<17.0.4085.5
17.0.4085.5
Microsoft SQL Server 2022<16.0.1200.5
16.0.1200.5
Microsoft SQL Server 2019 (CU 32)<15.0.4490.9
15.0.4490.9
Microsoft SQL Server 2017<14.0.2130.4
14.0.2130.4
Microsoft SQL Server 2017 (CU 31)<14.0.3550.4
14.0.3550.4
Microsoft SQL Server 2025<17.0.1135.8
17.0.1135.8
Microsoft SQL Server 2019<15.0.2190.7
15.0.2190.7
Microsoft SQL Server 2017<14.0.2130.4
Microsoft SQL Server 2017>=14.0.3006.16<14.0.3550.4
Microsoft SQL Server 2019<15.0.2190.7
Microsoft SQL Server 2019>=15.0.4003.23<15.0.4490.9
Microsoft SQL Server 2022<16.0.1200.5
Microsoft SQL Server 2022>=16.0.4003.1<16.0.4275.2
Microsoft SQL Server 2025<17.0.1135.8
Microsoft SQL Server 2025>=17.0.4006.2<17.0.4085.5
Remediation
Event History
Sep 8, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·05:14 PM
Data Sourced
via MITRE·05:14 PM
DescriptionSeverity
Data Sourced
via NVD·06:18 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
Who can exploit this vulnerability?
An attacker must already be authorized to access the affected SQL Server instance. Exploitation can be performed over the network and does not require user interaction.
2
What is the potential impact of successful exploitation?
A successful attacker could elevate privileges. The listed severity metrics indicate potential high impact to confidentiality, integrity, and availability.
3
Which SQL Server releases are identified as affected?
The affected software list includes Microsoft SQL Server 2017, 2019, 2022, and 2025, including SQL Server 2017 CU 31, SQL Server 2019 CU 32, SQL Server 2022 CU 26, and SQL Server 2025 CU8.