Deserialization in Microsoft SQL Server 2016 Service Pack 3 Azure Connect Feature
CVE-2026-54118
Deserialization of untrusted data in SQL Server allows an unauthorized attacker to execute code over a network.
Vulnerability class: Insecure Deserialization
EPSS: 0.012 (64.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Microsoft Sql Server 2016 Service Pack 3 Azure Connect Feature — versions 13.0.0
- Microsoft Sql Server 2016 Service Pack 3 (Gdr) — versions 13.0.0
- Microsoft Sql Server 2017 (Cu 31) — versions 14.0.0
- Microsoft Sql Server 2017 (Gdr) — versions 14.0.0
- Microsoft Sql Server 2019 (Cu 32) — versions 15.0.0.0
- Microsoft Sql Server 2019 (Gdr) — versions 15.0.0
- Microsoft Sql Server 2022 For X64-based Systems (Cu 25) — versions 16.0.4260.1
- Microsoft Sql Server 2022 (Gdr) — versions 16.0.0
- Microsoft Sql Server 2025 (Cu 6) — versions 17.0.4060.2
- Microsoft Sql Server 2025 For X64-based Systems (Gdr) — versions 17.0.1050.2
Weakness classification (CWE)
References
- Microsoft SQL Server Remote Code Execution Vulnerability (vendor-advisory, Patch, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-54118?
- CVE-2026-54118 is a critical-severity vulnerability in Microsoft SQL Server 2016 Service Pack 3 Azure Connect Feature, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-07-14.
- How severe is CVE-2026-54118?
- Critical severity. CVSS v3 base score is 9.8 out of 10.