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TI-2026-54554 Aliases CVE-2026-78456GHSA-h57r-w39w-33fc

SQL Server Remote Code Execution Vulnerability

Priority MEDIUM 42CWE-122Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.

Summary

Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00913 60th percentileScored 2026-11-07
Fix Fixed Microsoft: 2 updates

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft SQL Server 2022 (CU 26)16.0.0.0 to before 16.0.4275.216.0.4275.2Patch availableCNA
MicrosoftMicrosoft SQL Server 2022 (GDR)16.0.0 to before 16.0.1200.516.0.1200.5Patch availableCNA
  • Microsoft SQL Server 2022 (CU 26) VendorMicrosoft Affected 16.0.0.0 to before 16.0.4275.2 Fixed in 16.0.4275.2 Patch available CNA
  • Microsoft SQL Server 2022 (GDR) VendorMicrosoft Affected 16.0.0 to before 16.0.1200.5 Fixed in 16.0.1200.5 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:sql_server_2022:*:*:*:*:*:*:x64:*before 16.0.1200.5; 16.0.4003.1 to before 16.0.4275.2VulnerableMicrosoft
  • cpe:2.3:a:microsoft:sql_server_2022:*:*:*:*:*:*:x64:* Versions before 16.0.1200.5; 16.0.4003.1 to before 16.0.4275.2 Vulnerable ·Microsoft

Remediation

Microsoft 2 updates

  • KB5122771
    Security Update
    • Microsoft SQL Server 2022 for x64-based Systems (GDR) 16.0.1200.5
  • KB5122768
    Security Update
    • Microsoft SQL Server 2022 for x64-based Systems (CU 26) 16.0.4275.2

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Remote Code Execution
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-78456
  2. 2026-10-03 Alias added: GHSA-h57r-w39w-33fc

References

Patch 1

  • TI-2024-19132 Microsoft ODBC Driver for SQL Server Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
  • TI-2025-31689 Microsoft SQL Server Information Disclosure Vulnerability CVSS 3.1HIGH 7.5
  • TI-2026-39042 Microsoft SQL Server Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2026-39041 Microsoft SQL Server Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2024-25283 Microsoft SQL Server Elevation of Privilege Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2024-24853 Microsoft SQL Server Elevation of Privilege Vulnerability CVSS 3.1CRITICAL 9.8
See all 180 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences