CVE-2026-54117: critical vulnerability in Microsoft SQL Server 2025 (CU 6)
Microsoft SQL Server Remote Code Execution Vulnerability
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.8epss 1.5%
Deserialization of untrusted data in SQL Server allows an unauthorized attacker to execute code over a network.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected products
Microsoft · Microsoft SQL Server 2025 (CU 6)Microsoft · Microsoft SQL Server 2025 for x64-based Systems (GDR)Related CVEs — Microsoft SQL Server 2025 (CU 6)
In the same product, most dangerous first.
CVE-2026-77484HIGHMicrosoft SQL Server Remote Code Execution VulnerabilityEPSS 1.7%CVE-2026-21262HIGHSQL Server Elevation of Privilege VulnerabilityEPSS 1.7%CVE-2026-65674HIGHMicrosoft SQL Server Remote Code Execution VulnerabilityEPSS 1.6%CVE-2026-54118CRITICALMicrosoft SQL Server Remote Code Execution VulnerabilityEPSS 1.5%CVE-2026-26115HIGHSQL Server Elevation of Privilege VulnerabilityEPSS 1.3%CVE-2026-20803HIGHMicrosoft SQL Server Elevation of Privilege VulnerabilityEPSS 1.2%