Microsoft has launched safety updates to repair a severe vulnerability in SQL Server that enables attackers to realize increased system privileges.
The flaw, tracked as CVE-2025-59499, was disclosed on November 11, 2025, and impacts a number of variations together with SQL Server 2016, 2017, 2019, and 2022.
This vulnerability stems from improper dealing with of particular characters in SQL instructions, creating a gap for SQL injection assaults that may compromise database safety.
The vulnerability carries a CVSS rating of 8.8, marking it as a high-severity situation that requires fast consideration from system directors.
An attacker with low-level entry can exploit this flaw over a community with none person interplay, making it significantly harmful for uncovered database servers.
The problem impacts the confidentiality, integrity, and availability of SQL Server methods, doubtlessly permitting unauthorized entry to delicate knowledge and system controls.
Microsoft safety researchers recognized this vulnerability as a SQL injection weak point labeled underneath CWE-89.
The flaw permits licensed customers with restricted privileges to inject malicious T-SQL instructions by means of specifically crafted database names.
When efficiently exploited, attackers can execute arbitrary instructions with elevated permissions, doubtlessly gaining full management over the database system.
Assault Mechanism
The vulnerability works by exploiting how SQL Server processes database names in queries. Attackers can craft malicious database names containing particular SQL characters that aren’t correctly sanitized by the server.
When these crafted names are processed, the injected T-SQL instructions execute with the privileges of the method working the question.
If the method runs with sysadmin privileges, the attacker beneficial properties full administrative management over the whole SQL Server occasion, permitting them to learn, modify, or delete any knowledge, create new accounts, or execute system-level instructions.
Vulnerability Particulars:-
PropertyDetailsCVE IDCVE-2025-59499Vulnerability TypeSQL Injection (CWE-89)CVSS Score8.8 (Excessive)Assault VectorNetworkAttack ComplexityLowPrivileges RequiredLowUser InteractionNoneSeverityImportantPublicly DisclosedNoExploited in WildNoRelease DateNovember 11, 2025Affected VersionsSQL Server 2016, 2017, 2019, 2022
Microsoft has launched safety patches for all affected variations by means of each Normal Distribution Launch (GDR) and Cumulative Replace (CU) channels.
Directors ought to instantly apply the suitable updates primarily based on their present SQL Server model and replace path to guard their methods from potential exploitation.
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