What’s Vulnerable › Vulnerabilities

CVE-2026-77484: Microsoft SQL Server Remote Code Execution Vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-08 · updated 2026-10-30
• Weakness: CWE-502

Description

Deserialization of untrusted data in SQL Server allows an authorized attacker to execute code over a network.

Affected products

• Microsoft Sql Server 2019: before 15.0.2190.7; from 15.0.4003.23 before 15.0.4490.9 — fixed in 15.0.2190.7, 15.0.4490.9
• Microsoft Sql Server 2022: before 16.0.1200.5; from 16.0.4003.1 before 16.0.4275.2 — fixed in 16.0.1200.5, 16.0.4275.2
• Microsoft Sql Server 2025: before 17.0.1135.8; from 17.0.4006.2 before 17.0.4085.5 — fixed in 17.0.1135.8, 17.0.4085.5
• Microsoft SQL Server 2019 (CU 32): from 15.0.0.0 before 15.0.4490.9 — fixed in 15.0.4490.9
• Microsoft SQL Server 2019 (GDR): from 15.0.0 before 15.0.2190.7 — fixed in 15.0.2190.7
• Microsoft SQL Server 2022 (CU 26): from 16.0.0.0 before 16.0.4275.2 — fixed in 16.0.4275.2
• Microsoft SQL Server 2022 (GDR): from 16.0.0 before 16.0.1200.5 — fixed in 16.0.1200.5
• Microsoft SQL Server 2025 (CU8): from 17.0.0.0 before 17.0.4085.5 — fixed in 17.0.4085.5
• Microsoft SQL Server 2025 for x64-based Systems (GDR): from 17.0.1050.2 before 17.0.1135.8 — fixed in 17.0.1135.8

How to fix

Upgrade to a fixed version: Microsoft Sql Server 2019 15.0.2190.7, 15.0.4490.9; Microsoft Sql Server 2022 16.0.1200.5, 16.0.4275.2; Microsoft Sql Server 2025 17.0.1135.8, 17.0.4085.5; Microsoft SQL Server 2019 (CU 32) 15.0.4490.9; Microsoft SQL Server 2019 (GDR) 15.0.2190.7; Microsoft SQL Server 2022 (CU 26) 16.0.4275.2; Microsoft SQL Server 2022 (GDR) 16.0.1200.5; Microsoft SQL Server 2025 (CU8) 17.0.4085.5; Microsoft SQL Server 2025 for x64-based Systems (GDR) 17.0.1135.8. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77484

Get alerted when CVE-2026-77484 or the next vulnerability affects your stack