CVE-2026-67389 Microsoft CVE debrief

Who should care

System administrators and security teams responsible for Microsoft SQL Server deployments should assess their exposure and apply patches or mitigations as necessary.

Why it matters

The out-of-bounds read vulnerability in Microsoft SQL Server could allow an authorized attacker to disclose information over a network. System administrators and security teams should assess their exposure and apply patches or mitigations as necessary.

• Potential information disclosure
• Need to verify system configurations and patch levels
• Possible exploitation attempts by authorized attackers

Technical summary

The vulnerability is an out-of-bounds read in Microsoft SQL Server that could allow an authorized attacker to disclose information over a network. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. Microsoft has released a patch for this vulnerability. System administrators and security teams should assess their exposure and apply patches or mitigations as necessary.

Defensive priority

Apply patches and verify system configurations

Recommended defensive actions

• Apply patches released by Microsoft
• Verify system configurations and ensure they are up-to-date
• Monitor system activity for potential exploitation attempts

Evidence notes

The vulnerability is described in the CVE record and NVD vulnerability detail pages. Microsoft has released a vendor advisory and patch for this vulnerability.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.