CVE-2026-47295: 
vulnerability analysis and mitigation

CVE-2026-47295 is a SQL injection vulnerability in Microsoft SQL Server that allows an authenticated, low-privileged attacker to elevate privileges over a network. It was disclosed on July 14, 2026, as part of Microsoft's July 2026 Patch Tuesday security update. Affected products include Microsoft SQL Server 2016 (SP3 GDR and Azure Connect Feature Pack), 2017 (GDR and CU 31), 2019 (GDR and CU 32), 2022 (GDR and CU 25), and 2025 (GDR and CU 6) on x64-based systems. The vulnerability carries a CVSS v3.1 base score of 8.8 (High), assigned by Microsoft (Microsoft MSRC).

The vulnerability is classified as CWE-89 (Improper Neutralization of Special Elements used in an SQL Command), meaning user-supplied input is not properly sanitized before being incorporated into SQL queries executed by the SQL Server engine (Microsoft MSRC). An authenticated attacker with low-level database privileges can craft malicious SQL input to manipulate query logic, enabling privilege escalation within the database environment over a network connection. No user interaction is required, and attack complexity is rated low, making the vulnerability straightforward to exploit once network access and a low-privileged account are available. Relevant attack patterns include command-line execution through SQL injection (CAPEC-108), blind SQL injection (CAPEC-7), and expanding OS control from the database (CAPEC-470) (Feedly).

Successful exploitation allows an authenticated attacker to elevate their database privileges, potentially gaining high-level access to read, modify, or delete sensitive data stored in the SQL Server instance. The CVSS assessment reflects high impacts to confidentiality, integrity, and availability, indicating that a fully compromised SQL Server instance could expose all hosted data, allow unauthorized data manipulation, and disrupt database availability. In environments where SQL Server hosts sensitive business, financial, or personal data, exploitation could facilitate significant data breaches or enable further lateral movement within the network (Microsoft MSRC, Feedly).

As of the time of disclosure, there is no public proof-of-concept exploit and no evidence of in-the-wild exploitation (Feedly). CISA's SSVC assessment classifies exploitation as "none" and the vulnerability as not automatable, indicating it is not trivially weaponizable at scale. The EPSS score is approximately 0.92%, reflecting a low near-term probability of exploitation. The vulnerability is not listed in CISA's Known Exploited Vulnerabilities (KEV) catalog. No threat actor attribution has been reported.

1. Reconnaissance: Identify Microsoft SQL Server instances accessible over the network (e.g., via port 1433 scanning with tools like Nmap or Shodan), targeting versions prior to the July 2026 patches.
2. Obtain low-privileged credentials: Acquire a valid SQL Server account with minimal permissions, either through credential theft, phishing, or use of default/weak credentials.
3. Connect to the SQL Server: Establish a connection to the target SQL Server instance using a client tool such as sqlcmd, SQL Server Management Studio (SSMS), or a custom script.
4. Craft malicious SQL input: Identify SQL Server stored procedures, functions, or application entry points that incorporate user-supplied input into SQL queries without proper parameterization or sanitization.
5. Inject privilege-escalating payload: Submit crafted SQL input designed to manipulate query logic — for example, exploiting dynamic SQL construction to execute statements that grant elevated roles (e.g., sysadmin) or access restricted data.
6. Achieve elevated access: Leverage the escalated privileges to read sensitive data, modify database contents, execute operating system commands (e.g., via xp_cmdshell if enabled), or perform further lateral movement within the environment (Microsoft MSRC, Feedly).

• Logs: SQL Server error logs or audit logs showing unexpected execution of privilege-granting statements (e.g., GRANT, ALTER SERVER ROLE, sp_addsrvrolemember) by low-privileged accounts; unusual dynamic SQL execution patterns in SQL Server Profiler or Extended Events traces.
• Logs: Authentication logs showing a low-privileged account suddenly performing administrative operations or accessing databases outside their normal scope.
• Network: Unexpected or anomalous connections to SQL Server port 1433 from internal hosts not typically associated with database access; high-frequency query submissions from a single source.
• Process: Execution of xp_cmdshell or other extended stored procedures by accounts that do not normally use them; spawning of child processes (e.g., cmd.exe, powershell.exe) from the SQL Server process (sqlservr.exe).
• File System: New or modified SQL Server agent jobs, scheduled tasks, or startup stored procedures that were not previously present.

Microsoft released patches on July 14, 2026, as part of Patch Tuesday. Organizations should update to the following fixed versions: SQL Server 2016 SP3 GDR → 13.0.6500.1; SQL Server 2016 SP3 Azure Connect Feature Pack → 13.0.7095.1; SQL Server 2017 GDR → 14.0.2120.1; SQL Server 2017 CU 31 → 14.0.3540.1; SQL Server 2019 GDR → 15.0.2180.2; SQL Server 2019 CU 32 → 15.0.4480.2; SQL Server 2022 GDR → 16.0.1190.2; SQL Server 2022 CU 25 → 16.0.4262.2; SQL Server 2025 GDR → 17.0.1125.2 (Microsoft MSRC). As interim mitigations, restrict database user permissions to the minimum necessary (principle of least privilege), implement network access controls to limit SQL Server connectivity to authorized hosts only, validate and sanitize all user inputs before inclusion in SQL queries, and enable SQL Server audit policies to detect suspicious query activity (Feedly).

The vulnerability was noted in Microsoft's July 2026 Patch Tuesday coverage by security vendors including Lansweeper, Tenable (Nessus plugins 326864 and 326851), Qualys (detection ID 387867), Kaspersky, and NSFOCUS as part of broader patch Tuesday roundups (Feedly). No significant independent researcher commentary or social media discussion specific to this CVE has been identified beyond standard patch Tuesday aggregation.