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CVE-2026-67648 Microsoft CVE debrief

CVE-2026-67648 is a vulnerability in Microsoft SQL Server that allows 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. SQL Server administrators and security teams should assess exposure and apply patches to affected instances, including versions 2017, 2019, 2022, and 2025. This vulnerability is a use of uninitialized resource in SQL Server, allowing an authorized attacker to disclose information over a network.

Vendor
Microsoft
Product
Microsoft SQL Server 2017 (CU 31)
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-09-15
Advisory published
2026-09-08
Advisory updated
2026-09-15

Who should care

SQL Server administrators and security teams should assess exposure and apply patches to affected instances, including versions 2017, 2019, 2022, and 2025. They should also verify inventory of SQL Server instances, monitor for suspicious activity, and verify patches are applied to affected SQL Server instances.

Why it matters

CVE-2026-67648 is a vulnerability in Microsoft SQL Server that allows an authorized attacker to disclose information over a network. SQL Server administrators and security teams should assess exposure and apply patches to affected instances.

  • Verify patches are applied to affected SQL Server instances
  • Monitor for suspicious activity
  • Verify inventory of SQL Server instances

Technical summary

The vulnerability is a use of uninitialized resource in SQL Server, allowing an authorized attacker to disclose information over a network. The affected versions of SQL Server include 2017, 2019, 2022, and 2025. This vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. Microsoft has released a patch for this vulnerability, and SQL Server administrators and security teams should assess exposure and apply patches to affected instances.

Defensive priority

Apply patches to affected SQL Server instances

Recommended defensive actions

  • Apply patches to affected SQL Server instances
  • Verify inventory of SQL Server instances
  • Monitor for suspicious activity

Evidence notes

The vulnerability is described as a use of uninitialized resource in SQL Server, allowing an authorized attacker to disclose information over a network. The affected versions of SQL Server include 2017, 2019, 2022, and 2025.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-67648 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-67648

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

  • CVE-2026-67648 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-67648

    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.