CVE-2026-78441: Windows OLE DB Information Disclosure Vulnerability
Published Sep 8, 2026
·Updated
Out-of-bounds read in Windows OLE DB allows an unauthorized attacker to disclose information over a network.
Other sources
Windows OLE DB Information Disclosure Vulnerability
— Microsoft
Affected Software
8 affected componentsFixes available
Microsoft SQL Server 2019 (CU 32)<15.0.4490.9
15.0.4490.9
Microsoft SQL Server 2017 (CU 31)<14.0.3550.4
14.0.3550.4
Microsoft SQL Server 2017<14.0.2130.4
14.0.2130.4
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
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·05:18 PM
Data Sourced
via MITRE·05:18 PM
DescriptionSeverity
Data Sourced
via NVD·06:20 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
Which SQL Server deployments are identified as affected?
The listed affected software includes Microsoft SQL Server 2017, SQL Server 2017 CU 31, SQL Server 2019, and SQL Server 2019 CU 32.
2
Does exploitation require attacker credentials or local access?
The vector indicates network access and no privileges are required. It also indicates user interaction is required.
3
What is the expected security impact?
The supplied vector rates confidentiality impact as high, with no indicated integrity or availability impact. The issue is rated medium severity with a 6.5 base score.