CVE-2026-83945: CWE-122: Heap-based Buffer Overflow in Microsoft Microsoft SQL Server 2022 (GDR)
Description
Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.
CVSS v3.1
Score 6.6medium
Affected software
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)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a heap-based buffer overflow in Microsoft SQL Server 2022 (GDR) that can be exploited by an authorized attacker to execute arbitrary code remotely. It affects specific versions of SQL Server 2022 as detailed by the affected version ranges. The vulnerability has been assigned CVE-2026-83945 and is tracked under CWE-122. Microsoft has published an official security update to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability could allow an authorized attacker to execute arbitrary code on the affected SQL Server instance remotely, potentially leading to full compromise of the server. The CVSS 3.1 base score is 6.6, indicating medium severity with high impact on 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-2026-83945 to remediate this vulnerability. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-31T23:40:59.641Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83945","vendor":"Microsoft"}]
Threat ID: 6ace99952cdf04f656ad11d9
Added to database: 10/13/2026, 20:50:29 UTC
Last enriched: 10/13/2026, 21:04:11 UTC
Last updated: 10/14/2026, 00:08:27 UTC
Views: 8
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