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PatchSiren cyber security CVE debrief

CVE-2026-67390 Microsoft CVE debrief

A buffer over-read vulnerability in Microsoft SQL Server could allow an authorized attacker to disclose information over a network. This CVE was published on 2026-09-08T18:18:22.537Z and was last modified on 2026-09-15T18:43:37.733Z. The NVD entry is currently Analyzed. The vulnerability affects Microsoft SQL Server instances, particularly those exposed to the network, and requires defenders to assess their exposure and prioritize patching. The CVE record and NVD detail page provide information about the vulnerability, but do not specify which versions are affected or provide remediation details.

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

Defenders responsible for SQL Server instances, especially those exposed to the network, should assess their exposure and prioritize patching.

Why it matters

The CVE-2026-67390 vulnerability in Microsoft SQL Server could allow an authorized attacker to disclose information over a network, requiring defenders to verify and patch affected instances.

  • Potential information disclosure over the network
  • Need to verify and patch affected SQL Server instances
  • Possible impact on data confidentiality

Technical summary

The CVE-2026-67390 vulnerability is a buffer over-read issue 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. It is essential for defenders to verify and patch affected SQL Server instances, especially those exposed to the network, to prevent potential information disclosure.

Defensive priority

Defenders should prioritize verifying and patching affected SQL Server instances, especially those exposed to the network.

Recommended defensive actions

  • Verify and patch affected SQL Server instances
  • Review network exposure of SQL Server instances
  • Monitor for potential information disclosure attempts

Evidence notes

The CVE record and NVD detail page provide information about the vulnerability, but do not specify which versions are affected or provide remediation details.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-67390 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-67390

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

  • CVE-2026-67390 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-67390

    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.