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TI-2026-73651 Aliases CVE-2026-65674

Deserialization flaw in Microsoft SQL Server enables code execution

Priority MEDIUM 43CWE-502Published · 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. Impact type from CWE-502.

Summary

Multiple Microsoft SQL Server 2019, 2022 and 2025 builds are affected. Deserialization of untrusted data (CWE-502) lets an authorized network attacker execute code. The attacker needs low privileges and no user interaction, and the impact to confidentiality, integrity and availability is high.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Deserialization of untrusted data 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 0.01619 76th percentileScored 2026-11-07
Fix Fixed Microsoft SQL Server 2019 (GDR) (Microsoft): 15.0.2200.2Microsoft SQL Server 2019 for x64-based Systems (CU32) (Microsoft): 15.0.4500.2+4 more products

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 2019 (GDR)15.0.0 to before 15.0.2200.215.0.2200.2Patch availableCNA
MicrosoftMicrosoft SQL Server 2019 for x64-based Systems (CU32)15.0.4003.23 to before 15.0.4500.215.0.4500.2Patch availableCNA
MicrosoftMicrosoft SQL Server 2022 (GDR)16.0.0 to before 16.0.1210.316.0.1210.3Patch availableCNA
MicrosoftMicrosoft SQL Server 2022 for x64-based Systems (CU27)16.0.4003.1 to before 16.0.4305.516.0.4305.5Patch availableCNA
MicrosoftMicrosoft SQL Server 2025 for x64-based Systems (CU9)17.0.4006.2 to before 17.0.5015.417.0.5015.4Patch availableCNA
MicrosoftMicrosoft SQL Server 2025 for x64-based Systems (GDR)17.0.1050.2 to before 17.0.1145.417.0.1145.4Patch availableCNA
  • Microsoft SQL Server 2019 (GDR) VendorMicrosoft Affected 15.0.0 to before 15.0.2200.2 Fixed in 15.0.2200.2 Patch available CNA
  • Microsoft SQL Server 2019 for x64-based Systems (CU32) VendorMicrosoft Affected 15.0.4003.23 to before 15.0.4500.2 Fixed in 15.0.4500.2 Patch available CNA
  • Microsoft SQL Server 2022 (GDR) VendorMicrosoft Affected 16.0.0 to before 16.0.1210.3 Fixed in 16.0.1210.3 Patch available CNA
  • Microsoft SQL Server 2022 for x64-based Systems (CU27) VendorMicrosoft Affected 16.0.4003.1 to before 16.0.4305.5 Fixed in 16.0.4305.5 Patch available CNA
  • Microsoft SQL Server 2025 for x64-based Systems (CU9) VendorMicrosoft Affected 17.0.4006.2 to before 17.0.5015.4 Fixed in 17.0.5015.4 Patch available CNA
  • Microsoft SQL Server 2025 for x64-based Systems (GDR) VendorMicrosoft Affected 17.0.1050.2 to before 17.0.1145.4 Fixed in 17.0.1145.4 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:sql_server_2019:*:*:*:*:*:*:x64:*15.0.2000.5 to before 15.0.2200.2; 15.0.4003.23 to before 15.0.4500.2VulnerableMicrosoft
cpe:2.3:a:microsoft:sql_server_2022:*:*:*:*:*:*:x64:*16.0.1000.6 to before 16.0.1210.3; 16.0.4003.1 to before 16.0.4305.5VulnerableMicrosoft
cpe:2.3:a:microsoft:sql_server_2025:*:*:*:*:*:*:x64:*17.0.1000.7 to before 17.0.1145.4; 17.0.4006.2 to before 17.0.5015.4VulnerableMicrosoft
  • cpe:2.3:a:microsoft:sql_server_2019:*:*:*:*:*:*:x64:* Versions 15.0.2000.5 to before 15.0.2200.2; 15.0.4003.23 to before 15.0.4500.2 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:sql_server_2022:*:*:*:*:*:*:x64:* Versions 16.0.1000.6 to before 16.0.1210.3; 16.0.4003.1 to before 16.0.4305.5 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:sql_server_2025:*:*:*:*:*:*:x64:* Versions 17.0.1000.7 to before 17.0.1145.4; 17.0.4006.2 to before 17.0.5015.4 Vulnerable ·Microsoft

Remediation

Install the fixed versions for each product: Microsoft SQL Server 2019 (GDR) 15.0.2200.2, Microsoft SQL Server 2019 for x64-based Systems (CU32) 15.0.4500.2, Microsoft SQL Server 2022 (GDR) 16.0.1210.3, Microsoft SQL Server 2022 for x64-based Systems (CU27) 16.0.4305.5, Microsoft SQL Server 2025 for x64-based Systems (CU9) 17.0.5015.4 and Microsoft SQL Server 2025 for x64-based Systems (GDR) 17.0.1145.4.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Microsoft SQL Server 2019 (GDR) (Microsoft) Fixed in 15.0.2200.2
  • Fix · CNA Microsoft SQL Server 2019 for x64-based Systems (CU32) (Microsoft) Fixed in 15.0.4500.2
  • Fix · CNA Microsoft SQL Server 2022 (GDR) (Microsoft) Fixed in 16.0.1210.3
  • Fix · CNA Microsoft SQL Server 2022 for x64-based Systems (CU27) (Microsoft) Fixed in 16.0.4305.5
  • Fix · CNA Microsoft SQL Server 2025 for x64-based Systems (CU9) (Microsoft) Fixed in 17.0.5015.4
  • Fix · CNA Microsoft SQL Server 2025 for x64-based Systems (GDR) (Microsoft) Fixed in 17.0.1145.4

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-65674
  2. 2026-10-14 Priority changed: LOW → MEDIUM
  3. 2026-10-16 CISA SSVC decision points changed

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 206 →

Sources

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