Information disclosure via out-of-bounds OLE DB read
Published Sep 8, 2026 · Updated Sep 10, 2026
Out-of-bounds read in Windows OLE DB in Microsoft SQL Server 2017 and 2019 allows remote attackers to disclose information over a network. Microsoft has not published the affected function, input type, or boundary-check failure that permits the read beyond the intended buffer. Exploitation requires user interaction according to Microsoft's assessment, and the reported consequence is information disclosure without data modification or service interruption.
Summary
What happened
Out-of-bounds read in Windows OLE DB in Microsoft SQL Server 2017 and 2019 allows remote attackers to disclose information over a network. Microsoft has not published the affected function, input type, or boundary-check failure that permits the read beyond the intended buffer. Exploitation requires user interaction according to Microsoft's assessment, and the reported consequence is information disclosure without data modification or service interruption.
The record
- CVE
- CVE-2026-78441
- Published
- Sep 8, 2026
- Updated
- Sep 10, 2026
- Vendor
- Microsoft
- Product
- Microsoft SQL Server 2019
- Classifications
- CWE-125
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=15.0.0.0 <15.0.4490.9
- Affected versionversion=15.0.0 <15.0.2190.7
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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