A path traversal vulnerability (CVE-2026-40370, CVSS 8.8) in Microsoft SQL Server allows an authenticated attacker to execute arbitrary code under the SQL Server service account. Affected versions include SQL Server 2016 SP3 (GDR), 2017 (CU31/GDR), 2019 (CU32/GDR), 2022 (CU24/GDR), and 2025 (CU4/GDR). Microsoft has released security updates to remediate this issue; administrators should install the relevant patches available via the Microsoft Security Response Center.
Beveiligingsadviezen Download Beveilingsadvies; NCSC-2026-0146 [1.0.0] Beveiligingsadvies NCSC-2026-0146 [1.0.0] Publicatie 12-05-2026 19:53 (Europe/Amsterdam) Prioriteit Normaal Betreft Kwetsbaarheid verholpen in Microsoft SQL Server Kenmerken External Control of File Name or Path Omschrijving Microsoft heeft een kwetsbaarheid verholpen in SQL Server. Een geauthenticeerde kwaadwillende kan de kwetsbaarheid misbruiken om willekeurige code uit te voeren onder het account van de SQL server zelf. Oplossingen Microsoft heeft updates beschikbaar gesteld waarmee de beschreven kwetsbaarheden worden verholpen. We raden u aan om deze updates te installeren. Meer informatie over de kwetsbaarheden, de installatie van de updates en eventuele work-arounds vindt u op: https://portal.msrc.microsoft.com/en-us/security-guidance CVE's CVE-2026-40370 - CVSS (v3) 8.8 Producten Microsoft Microsoft SQL Server 2016 for x64-based Systems Service Pack 3 (GDR) Microsoft SQL Server 2016 for x64-based Systems Service Pack 3 Azure Connect Feature Pack Microsoft SQL Server 2017 for x64-based Systems (CU 31) Microsoft SQL Server 2017 for x64-based Systems (GDR) Microsoft SQL Server 2019 for x64-based Systems (CU 32) Microsoft SQL Server 2019 for x64-based Systems (GDR) Microsoft SQL Server 2022 for x64-based Systems (CU 24) Microsoft SQL Server 2022 for x64-based Systems (GDR) Microsoft SQL Server 2025 for x64-based Systems (CU4) Microsoft SQL Server 2025 for x64-based Systems (GDR) Disclaimer The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions: NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein. NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory. This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings.