CVE-2026-88089: CWE-122: Heap-based Buffer Overflow in Microsoft Microsoft SQL Server 2017 (GDR)
Description
Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code locally.
CVSS v3.1
Score 6.7medium
Affected software
Microsoft
Microsoft SQL Server 2017 (GDR)
Microsoft
Microsoft SQL Server 2017 for x64-based Systems (CU31)
Microsoft
Microsoft SQL Server 2019 (GDR)
Microsoft
Microsoft SQL Server 2019 for x64-based Systems (CU32)
Microsoft
Microsoft SQL Server 2022 (GDR)
Microsoft
Microsoft SQL Server 2022 for x64-based Systems (CU27)
Microsoft
Microsoft SQL Server 2025 (CU8)
Microsoft
Microsoft SQL Server 2025 for x64-based Systems (CU9)
Microsoft
Microsoft SQL Server 2025 for x64-based Systems (GDR)
pkg:maven/microsoft/sql-serverRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a heap-based buffer overflow in Microsoft SQL Server 2017 (GDR) and related versions, which permits an authorized attacker with high privileges to execute arbitrary code on the local system. The flaw is identified as CWE-122 and has a CVSS 3.1 base score of 6.7, indicating a medium severity level. The vulnerability requires local access with high privileges and does not involve user interaction. Microsoft has published an official fix to remediate this issue.
Potential Impact
An attacker with authorized access and high privileges on the affected Microsoft SQL Server instances can exploit this heap-based buffer overflow to execute arbitrary code locally. This could lead to full compromise of the affected system, impacting confidentiality, integrity, and availability.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security updates provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88089 to remediate this vulnerability. No additional mitigation steps are indicated by the vendor.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-09T21:47:30.203Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88089","vendor":"Microsoft"}]
Threat ID: 6ace9d332cdf04f656af1da4
Added to database: 10/13/2026, 21:05:55 UTC
Last enriched: 10/13/2026, 21:18:53 UTC
Last updated: 10/13/2026, 22:05:40 UTC
Views: 5
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