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CVE-2026-54117

CriticalCVSS 9.8/10Last modified Aug 20, 2026

Description

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

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
Microsoft	Microsoft SQL Server 2025 (CU 6)	>= 17.0.4060.2, < 17.0.4060.2
Microsoft	Microsoft SQL Server 2025 for x64-based Systems (GDR)	>= 17.0.1050.2, < 17.0.1125.2

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54117Patch, Vendor Advisory

Timeline

Published: Jul 14, 2026
Last modified: Aug 20, 2026
NVD status: Undergoing Analysis

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CVE-2026-54117: Critical severity, CVSS 9.8 | Vulnix