CVE-2025-53727: 
vulnerability analysis and mitigation

CVE-2025-53727 is a SQL injection vulnerability discovered in Microsoft SQL Server that allows an authorized attacker to elevate privileges over a network. The vulnerability was disclosed on August 12, 2025, and affects multiple versions of SQL Server including SQL Server 2016, 2017, 2019, and 2022 (NVD).

The vulnerability is classified as an improper neutralization of special elements used in an SQL command (SQL injection) vulnerability, identified as CWE-89. Microsoft has assigned a CVSS v3.1 base score of 8.8 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, indicating network vector, low attack complexity, low privileges required, no user interaction, and high impacts on confidentiality, integrity, and availability (NVD).

The vulnerability allows an authorized attacker to elevate privileges over a network, potentially gaining unauthorized access to sensitive data and system resources. The high CVSS score indicates severe potential impact on system security, affecting confidentiality, integrity, and availability of the SQL Server (NVD).

Microsoft has released security updates to address this vulnerability. The fixes are included in the August 2025 security update (KB5063756) which updates SQL Server 2022 to version 16.0.1145.1. Similar updates are available for other affected SQL Server versions (Microsoft KB).

The vulnerability was part of Microsoft's August 2025 Patch Tuesday release, which included fixes for multiple SQL Server security issues. It was one of five SQL Server vulnerabilities addressed in this update cycle (Fortra).