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CVE-2026-67385 Microsoft CVE debrief

Microsoft SQL Server vulnerability CVE-2026-67385 allows an authorized attacker to execute code over a network due to a use-after-free issue. The vulnerability has a CVSS score of 8.8 and is considered HIGH severity. Microsoft has released a patch for this vulnerability. This use-after-free vulnerability in Microsoft SQL Server can be exploited by authorized attackers to execute code over a network, potentially leading to data breaches, service disruptions, and other security issues. Affected versions of SQL Server include 2017, 2019, 2022, and 2025. SQL Server administrators and users, especially those with internet-exposed instances or multi-user environments, should assess their

Vendor
Microsoft
Product
Microsoft SQL Server 2017 (CU 31)
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-09-16
Advisory published
2026-09-08
Advisory updated
2026-09-16

Who should care

SQL Server administrators and users, especially those with internet-exposed instances or multi-user environments, should assess exposure and apply patches immediately.

Why it matters

CVE-2026-67385 is a high-severity vulnerability in Microsoft SQL Server that requires immediate attention from SQL Server administrators and users. The vulnerability allows authorized attackers to execute code over a network, potentially leading to data breaches, service disruptions, and other security issues. Affected versions of SQL Server include 2017, 2019, 2022, and 2025, and patches have been released by Microsoft.

  • Code execution over a network by authorized attackers
  • Potential data breaches or unauthorized access
  • Disruption of SQL Server services
  • Need for immediate patching and version verification

Technical summary

CVE-2026-67385 is a use-after-free vulnerability in Microsoft SQL Server that allows an authorized attacker to execute code over a network. The vulnerability has a CVSS score of 8.8 and is considered HIGH severity. Affected versions of SQL Server include 2017, 2019, 2022, and 2025.

Defensive priority

Apply patches immediately for SQL Server instances, especially those exposed to the internet or used by multiple users.

Recommended defensive actions

  • Apply patches for SQL Server instances
  • Review and update SQL Server versions to ensure they are not vulnerable
  • Monitor SQL Server logs for suspicious activity

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score and affected versions of SQL Server. Microsoft has released a patch for this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-67385 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-67385

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-67385 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-67385

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental 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.