Authenticated memory disclosure via out-of-bounds read
Published Sep 8, 2026 · Updated Sep 10, 2026
Out-of-bounds read in Microsoft SQL Server 2017, 2019, 2022, and 2025 allows remote authenticated users to disclose memory over a network. Microsoft identifies a read beyond an allocated buffer as the faulty operation but has not disclosed the input, function, or subsystem that reaches it. A valid SQL Server account is required, and the documented consequence is memory disclosure without reported data modification or service interruption.
Summary
What happened
Out-of-bounds read in Microsoft SQL Server 2017, 2019, 2022, and 2025 allows remote authenticated users to disclose memory over a network. Microsoft identifies a read beyond an allocated buffer as the faulty operation but has not disclosed the input, function, or subsystem that reaches it. A valid SQL Server account is required, and the documented consequence is memory disclosure without reported data modification or service interruption.
The record
- CVE
- CVE-2026-67645
- Published
- Sep 8, 2026
- Updated
- Sep 10, 2026
- Vendor
- Microsoft
- Product
- Microsoft SQL Server 2022
- Classifications
- CWE-125
- Attack vector
- network
- Privileges
- authenticated
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=16.0.0.0 <16.0.4275.2
- Affected versionversion=16.0.0 <16.0.1200.5
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
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Technologies
Your stack
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Your stack
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