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CVE-2026-67630 Microsoft CVE debrief

Microsoft SQL Server Information Disclosure Vulnerability allows an authorized attacker to disclose information over a network due to an out-of-bounds read in SQL Server. This vulnerability has a CVSS score of 6.5 and is considered MEDIUM severity. The CVE record was published on 2026-09-08T17:10:43.045Z and last modified on 2026-10-08T18:12:17.552Z.

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
2026-10-08
Advisory published
2026-09-08
Advisory updated
2026-10-08

Who should care

Defenders responsible for SQL Server deployments should assess exposure and prioritize patching affected versions to prevent potential information disclosure.

Why it matters

CVE-2026-67630 is a MEDIUM-severity vulnerability allowing authorized attackers to disclose information over a network. Defenders should prioritize patching affected SQL Server versions, verifying inventory for exposure, and monitoring for potential information disclosure attempts.

  • Verify inventory for exposure to affected SQL Server versions
  • Monitor for potential information disclosure attempts
  • Patch affected SQL Server versions to prevent exploitation

Technical summary

The vulnerability is caused by an out-of-bounds read in SQL Server, allowing an authorized attacker to disclose information over a network. Affected versions include Microsoft SQL Server 2017 (CU 31), 2017 (GDR), 2019 (CU 32), 2019 (GDR), 2022 (CU 26), 2022 (GDR), 2025 (CU8), and 2025 for x64-based Systems (GDR).

Defensive priority

Defenders should prioritize patching affected SQL Server versions, verifying inventory for exposure, and monitoring for potential information disclosure attempts.

Recommended defensive actions

  • Patch affected SQL Server versions
  • Verify inventory for exposure
  • Monitor for potential information disclosure attempts

Evidence notes

The CVE Program record and NVD vulnerability detail provide official information about the vulnerability. Microsoft's advisory is referenced as a supplemental source.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-67630 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-67630

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

  • CVE-2026-67630 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-67630

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

Supplemental references

  • Microsoft SQL Server Information Disclosure Vulnerability

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/67xxx/CVE-2026-67630.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67630

    Supplemental source - vendor-advisory, patch

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.