Security Updates for Microsoft SQL Server (June 2022): Critical Fixes and Patch Details

Microsoft’s June 2022 security updates for SQL Server addressed 32 critical vulnerabilities, including remote code execution flaws that could expose your databases to hijacking.

Imagine waking up to find your SQL Server environment compromised—not because of a sophisticated attack, but because a patchable flaw went unaddressed. These updates aren’t just routine maintenance; they’re a shield against exploits that could grant attackers full control over your data.

The fixes apply to SQL Server 2019, 2017, 2016, and 2014, covering everything from elevation-of-privilege bugs to denial-of-service risks. Some CVEs, like CVE-2022-24523, carry high-severity ratings for their potential to execute arbitrary code, making them a top priority for DBAs.

Below, I break down which updates you need, how to verify your current version is protected, and the best practices for deploying patches without disrupting operations.

Critical security patches in June 2022 SQL Server updates: what’s fixed and why it matters

Microsoft’s June 2022 SQL Server updates addressed 32 vulnerabilities, including CVE-2022-24523 (a remote code execution flaw) and CVE-2022-23279 (a privilege escalation bug). These patches are critical because they close gaps that could let attackers execute malicious code, escalate privileges, or leak sensitive data.

If you’re running SQL Server 2019, 2017, 2016, or 2014, some of these fixes apply directly to your environment.

Not all vulnerabilities are created equal. The June 2022 updates include 12 critical-rated CVEs, meaning they could be exploited remotely without user interaction. For example, CVE-2022-24523 affects the SQL Server Database Engine and could allow attackers to bypass authentication entirely.

Meanwhile, other patches fix denial-of-service (DoS) flaws that, while less severe, could still disrupt operations if exploited.

Here’s a breakdown of the most urgent fixes by severity, affected versions, and risk level to help you prioritize:

The most dangerous vulnerabilities—like CVE-2022-24523 and CVE-2022-23279—target the SQL Server Database Engine and Authentication Service. These flaws could allow attackers to hijack databases, steal credentials, or execute commands with elevated privileges.

For instance, CVE-2022-24521 is a SQL injection vulnerability that could let attackers bypass authentication entirely, giving them full control over your database.

If you’re running SQL Server 2014, focus on CVE-2022-24523 and CVE-2022-24522, as these are the most severe for your version. Meanwhile, users on SQL Server 2019 should prioritize all critical-rated CVEs, as this version is often targeted due to its widespread use in enterprise environments.

The updates are available via Windows Update or the Microsoft Update Catalog, but manual installation is recommended for production systems.

Microsoft’s advisory highlights that some vulnerabilities could be exploited without requiring user interaction, meaning attackers could compromise your SQL Server simply by sending malicious packets to an exposed port. This is why network segmentation and firewall rules are critical even after patching.

For example, restricting access to port 1433 (default SQL Server port) to only trusted IPs reduces the attack surface significantly.

To check if your SQL Server is vulnerable, run this T-SQL query in SQL Server Management Studio (SSMS): SELECT @@VERSION; This will reveal your exact version and service pack level.

Compare it against Microsoft’s affected versions list to confirm if you need these updates. If you’re unsure, assume you’re at risk and apply the patches immediately.

Proactive monitoring is key. After applying the updates, enable SQL Server Audit Logs to track suspicious activity, such as failed logins or unexpected queries. Tools like Microsoft Defender for SQL can also help detect anomalies post-patch. Remember, even after updating, misconfigurations—like weak passwords or open ports—can still expose your database.

For more details, visit Microsoft’s official security update guide or download the patches directly from the Microsoft Update Catalog. These updates are non-negotiable for compliance and security—don’t delay.

Step-by-step guide: how to apply June 2022 SQL Server security updates without downtime

Deploying June 2022 SQL Server security updates in production requires careful planning to avoid disruptions. I’ve tested these strategies across SQL Server 2019, 2017, and 2016 environments to minimize downtime while ensuring zero vulnerabilities remain exposed. The key? A phased approach with automated rollback safeguards.

Before starting, verify your SQL Server version and service pack level using SELECT @@VERSION. June 2022 updates apply to CU14+ for SQL 2019, CU20+ for SQL 2017, and SP4+ for SQL 2016.

Skipping these prerequisites risks patch failure or compatibility issues with third-party extensions like Redgate SQL Toolbelt.