CVE-2026-67386: CWE-908: Use of Uninitialized Resource in Microsoft Microsoft SQL Server 2017 (CU 31)
Description
CVE-2026-67386 is a vulnerability in Microsoft SQL Server 2017 (CU 31) involving the use of an uninitialized resource. This flaw allows an authorized attacker to disclose sensitive information over a network. The vulnerability has a medium severity rating with a CVSS score of 6.5. An official fix is available from Microsoft to address this issue.
CVSS v3.1
Score 6.5medium
Affected software
Microsoft
Microsoft SQL Server 2017 (CU 31)
Microsoft
Microsoft SQL Server 2017 (GDR)
Microsoft
Microsoft SQL Server 2019 (CU 32)
Microsoft
Microsoft SQL Server 2019 (GDR)
Microsoft
Microsoft SQL Server 2022 (CU 26)
Microsoft
Microsoft SQL Server 2022 (GDR)
Microsoft
Microsoft SQL Server 2025 (CU8)
Microsoft
Microsoft SQL Server 2025 for x64-based Systems (GDR)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-67386) in Microsoft SQL Server 2017 (CU 31) is classified as CWE-908: Use of Uninitialized Resource. It allows an attacker with authorized access to the SQL Server to potentially disclose sensitive information remotely over the network. The CVSS 3.1 base score is 6.5, indicating medium severity, with the attack vector being network-based and requiring low attack complexity and privileges. The vulnerability does not impact integrity or availability, but confidentiality is impacted. Microsoft has released an official fix for this issue.
Potential Impact
An authorized attacker can exploit this vulnerability to disclose sensitive information over the network. There is no indication of impact on system integrity or availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. It is recommended to apply the security update provided by Microsoft to affected versions of SQL Server 2017 (CU 31) to remediate this issue. Refer to the Microsoft security update guide for CVE-2026-67386 for detailed patch information.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-29T14:57:03.841Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67386","vendor":"Microsoft"}]
Threat ID: 6aa044cbacd9273b49fa7b5e
Added to database: 09/08/2026, 17:24:27 UTC
Last enriched: 10/16/2026, 20:51:12 UTC
Last updated: 10/21/2026, 13:40:30 UTC
Views: 26
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