CVE-2019-1068: Microsoft SQL Server improper input validation remote code execution

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 17 September 2026. Confidence: medium.

high priorityThe flaw is remotely reachable, rated 8.8, listed in CISA KEV with a near-term remediation due date, and has a high EPSS score, though it requires valid credentials.

What it is

Microsoft SQL Server mishandles processing of internal functions, allowing an authenticated remote attacker to execute code on the database server. The flaw affects SQL Server 2016 and 2017 and carries a CVSS 3.1 base score of 8.8, so a compromised or low-privilege database account can escalate to full server compromise.

Impact

An attacker with valid credentials gains code execution in the context of the SQL Server service, leading to full loss of confidentiality, integrity and availability on the host. This can enable data theft, tampering and use of the server as a foothold for lateral movement.

Attack surface

Reachable over the network via the SQL Server service (AV:N, AC:L) with low privileges required (PR:L) and no user interaction (UI:N). Any account able to authenticate to the instance, including a low-privilege login, is sufficient to attempt exploitation.

Exploitation

CVE-2019-1068 is listed in CISA's Known Exploited Vulnerabilities catalog, indicating exploitation in the wild, and EPSS gives a 30-day probability of 0.528 (98.9th percentile). No ransomware campaign use is documented in the record.

What to do

• Apply the Microsoft security update for CVE-2019-1068 to all affected SQL Server 2016 and 2017 instances, prioritizing internet-facing systems per CISA BOD 26-04.
• Restrict network access to SQL Server ports (default 1433) to trusted hosts and remove direct internet exposure where possible.
• Audit and reduce SQL logins, removing unnecessary accounts and enforcing least privilege so low-privilege users cannot reach vulnerable functionality.
• If patching cannot be completed by the CISA due date, discontinue use of the affected product or apply the vendor-recommended mitigations.
• Monitor for and investigate unexpected code execution or process creation originating from the SQL Server service account.

Detection

• Alert on unusual child processes spawned by sqlservr.exe, which may indicate code execution via the database engine.
• Review SQL Server error logs and Windows event logs for anomalous internal function calls or crashes around the time of suspected exploitation.
• Monitor authentication logs for logins from unexpected hosts or accounts, especially low-privilege logins followed by privileged operations.
• Track network connections to SQL Server ports from untrusted or external sources.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.