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PatchSiren cyber security CVE debrief

CVE-2026-73029 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 2026-09-08T18:20:32.987Z and was last modified on 2026-09-15T16:11:20.427Z. The NVD entry is currently Analyzed. The vulnerability affects SQL Server deployments, especially for versions 2019, 2022, and 2025. Defenders should assess exposure and prioritize patching or mitigation. The CVE record and NVD detail page provide information about the vulnerability, including its CVSS score and vector.

Vendor
Microsoft
Product
Microsoft SQL Server 2019 (CU 32)
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 deployments, especially for versions 2019, 2022, and 2025, should assess exposure and prioritize patching or mitigation.

Why it matters

A buffer over-read vulnerability in Microsoft SQL Server could allow an authorized attacker to disclose information over a network. Defenders should prioritize verifying exposure in SQL Server deployments, especially for versions 2019, 2022, and 2025, and apply patches or mitigations as recommended by Microsoft.

  • Verify exposure in SQL Server deployments.
  • Apply patches or mitigations to prevent information disclosure.
  • Monitor for potential information disclosure attempts.

Technical summary

The vulnerability is a buffer over-read in Microsoft SQL Server, which could allow an authorized attacker to disclose information over a network. The CVSS score is 6.5, and the CVSS vector is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N. The vulnerability affects SQL Server versions 2019, 2022, and 2025. Defenders should prioritize verifying exposure in SQL Server deployments and apply patches or mitigations as recommended by Microsoft.

Defensive priority

Defenders should prioritize verifying exposure in SQL Server deployments, especially for versions 2019, 2022, and 2025, and apply patches or mitigations as recommended by Microsoft.

Recommended defensive actions

  • Verify SQL Server deployments for exposure, especially for versions 2019, 2022, and 2025.
  • Apply patches or mitigations recommended by Microsoft.
  • Monitor for potential information disclosure attempts.

Evidence notes

The CVE record and NVD detail page provide information about the vulnerability, including its CVSS score and vector. Microsoft has provided a vendor advisory and patch for the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-73029 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-73029

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

  • CVE-2026-73029 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-73029

    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.