CVE-2025-49719: 
vulnerability analysis and mitigation

CVE-2025-49719 is an information disclosure vulnerability discovered in Microsoft SQL Server, publicly disclosed prior to patches being available in July 2025. The vulnerability allows an unauthorized attacker to disclose information over a network by obtaining uninitialized memory. It has been assigned a CVSSv3 score of 7.5 and is rated as important (Tenable Blog, Help Net Security).

The vulnerability stems from improper input validation in SQL Server that could allow an unauthenticated attacker to obtain uninitialized memory over a network. Microsoft has assessed this vulnerability as 'Exploitation Less Likely' according to their Exploitability Index, with exploit code being classified as 'unproven' (NVD, Tenable Blog).

The vulnerability enables unauthorized attackers to access and disclose uninitialized memory from affected SQL Server instances, potentially leading to information disclosure over a network (NVD).

Users of SQL Server are advised to update to the latest version which includes the necessary driver fixes. For applications or software from other vendors that use SQL Server, users need to update to Microsoft OLE DB Driver for SQL Server version 18 or 19, ensuring compatibility before updating (Help Net Security, Tenable Blog).