CVE-2026-65674: CWE-502: Deserialization of Untrusted Data in Microsoft Microsoft SQL Server 2019 (GDR)
Description
Deserialization of untrusted data in SQL Server allows an authorized attacker to execute code over a network.
CVSS v3.1
Score 8.8high
Affected software
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 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 (CVE-2026-65674) involves deserialization of untrusted data in Microsoft SQL Server 2019 (GDR) and later versions. An authorized attacker can exploit this flaw to execute arbitrary code remotely over a network. The CVSS 3.1 base score is 8.8, indicating high severity with network attack vector, low attack complexity, and no user interaction required. The vulnerability affects several version ranges across SQL Server 2019 and subsequent releases. Microsoft has published an official fix to remediate this issue.
Potential Impact
Successful exploitation allows an authorized attacker to execute arbitrary code remotely on the affected SQL Server instance, potentially leading to full compromise of the server, including confidentiality, integrity, and availability impacts.
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-2026-65674 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-22T18:16:01.898Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65674","vendor":"Microsoft"}]
Threat ID: 6ace9d312cdf04f656af1d95
Added to database: 10/13/2026, 21:05:53 UTC
Last enriched: 10/13/2026, 21:18:44 UTC
Last updated: 10/13/2026, 22:50:42 UTC
Views: 5
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