Junglewise Threat Intelligence

CVE-2026-66819: Microsoft SQL Server SQL injection privilege escalation

CVE-2026-66819 · Severity: high · CVSS 8.8 · Published 2026-09-08

Technologies: Microsoft SQL Server. Vendors: Microsoft.

Executive brief

Microsoft SQL Server contains an SQL injection vulnerability that allows an authenticated attacker to execute arbitrary SQL commands and escalate privileges. This could enable an attacker with database access to gain administrative control, access sensitive data, or disrupt database operations.

Technical details

The vulnerability is a SQL injection flaw in SQL Server that arises from improper neutralization of special characters in SQL commands. An authorized attacker with network connectivity to the SQL Server can craft malicious SQL queries that bypass input validation and execute arbitrary code with elevated privileges. The attack requires existing authentication but allows privilege escalation from a standard user account to administrative or system-level access.

Affected products

  • Microsoft SQL Server

Timeline

  • 2026-09-08: disclosed

References

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