High [CVE-2026-78456] SQL Server Remote Code Execution Vulnerability
This high-severity Microsoft Server advisory covers CVE-2026-78456 affecting Microsoft SQL Server 2022 (CU 26), Microsoft SQL Server 2022 (GDR).
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Summary
Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.
Affected products named by the advisory: Microsoft SQL Server 2022 (CU 26); Microsoft SQL Server 2022 (GDR).
- Microsoft SQL Server 2022 (CU 26) 16.0.0.0 before 16.0.4275.2
- Microsoft SQL Server 2022 (GDR) 16.0.0 before 16.0.1200.5
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- 16.0.4275.2
- 16.0.1200.5
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 16.0.4275.2, 16.0.1200.5. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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