8.8
High
CVE-2026-65674 Deserialization of untrusted data in SQL Server allows an authorized attacker to execute code over a network
Description
Deserialization of untrusted data in SQL Server allows an authorized attacker to execute code over a network.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Microsoft SQL Server 2019 (GDR) 15.0 | 15.0.0 → < 15.0.2200.2 | 15.0.2200.2 |
| Microsoft SQL Server 2019 for x64-based Systems (CU32) 15.0 | 15.0.4003.23 → < 15.0.4500.2 | 15.0.4500.2 |
| Microsoft SQL Server 2022 (GDR) 16.0 | 16.0.0 → < 16.0.1210.3 | 16.0.1210.3 |
| Microsoft SQL Server 2022 for x64-based Systems (CU27) 16.0 | 16.0.4003.1 → < 16.0.4305.5 | 16.0.4305.5 |
| Microsoft SQL Server 2025 for x64-based Systems (CU9) 17.0 | 17.0.4006.2 → < 17.0.5015.4 | 17.0.5015.4 |
| Microsoft SQL Server 2025 for x64-based Systems (GDR) 17.0 | 17.0.1050.2 → < 17.0.1145.4 | 17.0.1145.4 |
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