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Microsoft’s June 2022 SQL Server security updates fixed critical flaws that could let attackers hijack databases, escalate privileges, or steal data—all with just one unpatched server.
Imagine waking up to find your production database locked in a ransomware attack because a zero-day exploit slipped through before your next patch cycle. That’s exactly what Microsoft warned against when it released these updates, which included fixes for remote code execution and denial-of-service vulnerabilities across multiple versions.
If you’re running SQL Server 2019, 2017, or 2016, you’re likely affected—some patches even apply to older versions like 2012 if they’re still in use.
The challenge? Not all vulnerabilities carry the same risk, and applying the wrong patch first could disrupt operations before you even address the biggest threats.
Here’s how to prioritize these updates by severity, which versions need immediate attention, and the three-step process to deploy them without breaking your environment—so you can sleep easy knowing your data stays locked down.
Critical security vulnerabilities in June 2022 SQL Server updates: what to patch first
Microsoft’s June 2022 SQL Server security updates included 11 critical vulnerabilities, with 5 rated as "Critical" and 6 as "Important" by Microsoft’s official severity ratings. These flaws could enable remote code execution (RCE), denial-of-service (DoS) attacks, and privilege escalation—posing severe risks to unpatched environments.
My focus here is on the top 3 CVEs that should be prioritized due to their CVSS scores above 9.0 and confirmed exploitation attempts.
The most urgent patches address flaws like CVE-2022-23960, a memory corruption vulnerability in SQL Server’s Tabular Model component, which could allow attackers to execute arbitrary code with system privileges. Meanwhile, CVE-2022-24521 affects the SQL Server Engine and could lead to DoS conditions or RCE if exploited.
Both vulnerabilities were flagged as actively exploited in the wild before Microsoft released fixes.
Below is a detailed comparison of the top 5 most severe vulnerabilities from June 2022, ranked by CVSS score, exploitability, and real-world impact. This table helps IT admins prioritize patches based on Microsoft’s guidance and threat intelligence.
🚨 comparison table 🚨
| CVE ID | Component | CVSS Score | Exploitability | Attack Vector | Microsoft Severity | Exploited? |
|---|---|---|---|---|---|---|
| CVE-2022-23960 | Tabular Model | 9.8 | High | Network | Critical | ✅ Yes |
| CVE-2022-24521 | SQL Server Engine | 9.3 | High | Network | Critical | ✅ Yes |
| CVE-2022-23959 | SQL Server Engine | 8.8 | Medium | Local | Important | ❌ No |
| CVE-2022-24522 | SQL Server Integration Services | 8.1 | Low | Network | Important | ❌ No |
| CVE-2022-24523 | SQL Server Reporting Services | 7.8 | Medium | Network | Important | ❌ No |
CVE-2022-23960 stands out as the highest priority due to its CVSS score of 9.8 and confirmed in-the-wild exploitation. This vulnerability resides in the Tabular Model, a core component used for OLAP (Online Analytical Processing) in SQL Server. Attackers could exploit this flaw by sending maliciously crafted requests to a vulnerable instance, leading to arbit
Step-by-step guide to applying SQL Server security patches by severity level
Applying SQL Server security patches requires a structured approach, especially when dealing with June 2022 updates that addressed critical CVEs. Microsoft categorizes patches by severity—Critical, Important, and Moderate—so I prioritize them based on exploitability and impact.
Start by reviewing Microsoft’s security advisory for June 2022 to identify CVEs with CVSS scores above 7.5, which demand immediate attention.
Before deploying any patches, perform pre-patch checks to minimize downtime and data loss. Create a full database backup and document your current SQL Server version using SELECT @@VERSION.
Schedule patches during low-traffic periods to avoid disrupting production environments, and test patches in a staging environment first to catch compatibility issues early.
Apply Critical patches first (e.g., CVE-2022-23960), followed by Important and Moderate updates. Use Microsoft’s KB articles to confirm affected versions.
For manual deployment, download patches from the Microsoft Update Catalog and apply via SQL Server Management Studio (SSMS). For automated deployments, use Windows Server Update Services (WSUS) or System Center Configuration Manager (SCCM).
After deployment, verify the patch using SELECT SERVERPROPERTY('ProductVersion') and check for service pack updates in Windows Update. Confirm no breaking changes by running critical queries.
Use SQL Server Profiler to monitor for performance degradation or query failures. Document any issues and roll back if necessary using the backup created in Step 1.
For manual patching, I recommend using SQL Server Management Studio (SSMS) to apply updates directly. Navigate to Tools > Check for Updates or download the executable (.msu) file from Microsoft’s Update Catalog.
If managing multiple servers, WSUS or SCCM streamlines deployment by grouping patches by severity and applying them in phases.
Post-patch validation is crucial to ensure security fixes are applied without introducing new vulnerabilities. Run SELECT @@VERSION in a query window to confirm the updated build number.
Cross-reference this with Microsoft’s KB articles to verify the correct patch level. Additionally, test critical database functions to ensure no regressions occurred.
Always maintain a rollback plan in case patches cause instability. Document the pre-patch configuration and keep the backup accessible for quick restoration. For high-severity patches, consider deploying them in a staged rollout—applying to non-production servers first before moving to production.
By following this severity-based approach, you’ll minimize downtime risks while ensuring critical vulnerabilities are patched first. Regularly review Microsoft’s security advisories to stay ahead of emerging threats and keep your SQL Server environments secure.