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PatchSiren cyber security CVE debrief

CVE-2026-78441 Microsoft CVE debrief

CVE-2026-78441 is a MEDIUM-severity vulnerability in Windows OLE DB that allows unauthorized attackers to disclose information over a network. Defenders should assess exposure, prioritize remediation, and verify affected versions. The vulnerability affects certain versions of Microsoft SQL Server 2017 and 2019. Affected defenders must review vendor advisories for specific version impacts and apply patches accordingly. This vulnerability has a CVSS score of 6.5, indicating a moderate severity level.

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
2026-09-23
Advisory published
2026-09-08
Advisory updated
2026-09-23

Who should care

Defenders responsible for Windows OLE DB and Microsoft SQL Server systems should assess exposure and prioritize remediation. This includes IT administrators, security teams, and operators managing these systems. They must verify affected versions and apply patches to prevent potential information disclosure.

Why it matters

CVE-2026-78441 is a MEDIUM-severity vulnerability in Windows OLE DB that allows unauthorized attackers to disclose information over a network. Defenders should assess exposure, prioritize remediation, and verify affected versions.

  • Potential information disclosure
  • Verification of affected versions required
  • Remediation priority for exposed systems

Technical summary

CVE-2026-78441 is an out-of-bounds read vulnerability in Windows OLE DB that allows unauthorized attackers to disclose information over a network. The vulnerability affects certain versions of Microsoft SQL Server 2017 and 2019. Defenders should prioritize verifying affected SQL Server versions and applying patches. This vulnerability has a CVSS score of 6.5, indicating a moderate severity level.

Defensive priority

Defenders should prioritize verifying affected SQL Server versions and applying patches.

Recommended defensive actions

  • Verify affected SQL Server versions
  • Apply patches
  • Monitor for potential information disclosure

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but vendor advisory and patch information are limited. The CVE was published on 2026-09-08T18:20:41.890Z. Defenders should verify affected SQL Server versions and apply patches. Limited source detail exists, so explicit evidence-limit language and defensive verification tasks are required.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-78441 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-78441

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

  • CVE-2026-78441 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-78441

    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.