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CVE-2026-88085 Microsoft CVE debrief

Microsoft SQL Server Elevation of Privilege Vulnerability allows an authorized attacker to elevate privileges locally due to a heap-based buffer overflow. This vulnerability impacts Microsoft SQL Server deployments, requiring defenders to assess exposure and prioritize patching. The CVE record and NVD entry provide details on the vulnerability, but additional verification is needed to confirm affected versions and environments. Defenders should verify patch deployment for affected versions, assess exposure in environments, and monitor for suspicious activity.

Vendor
Microsoft
Product
Microsoft SQL Server 2017 (GDR)
CVSS
MEDIUM 6.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-13
Original CVE updated
2026-10-14
Advisory published
2026-10-13
Advisory updated
2026-10-14

Who should care

Defenders responsible for Microsoft SQL Server deployments should assess exposure and prioritize patching. This includes verifying patch deployment for affected versions, assessing exposure in environments, and monitoring for suspicious activity. Security teams should review compensating controls for exposed systems while remediation is scheduled and verified. Operators and administrators of Microsoft SQL Server must

Why it matters

CVE-2026-88085 allows authorized attackers to elevate privileges locally, requiring defenders to prioritize patching and verify exposure.

  • Verify patch deployment for affected versions
  • Assess exposure in environments
  • Monitor for suspicious activity
  • Prioritize patching for high-risk environments

Technical summary

A heap-based buffer overflow in Microsoft SQL Server allows an authorized attacker to elevate privileges locally. This vulnerability is caused by improper handling of input data, allowing attackers to exploit the vulnerability and gain elevated privileges. Defenders should prioritize patching affected Microsoft SQL Server versions and verify exposure in their environments.

Defensive priority

Defenders should prioritize patching affected Microsoft SQL Server versions and verify exposure in their environments.

Recommended defensive actions

  • Patch affected Microsoft SQL Server versions
  • Verify exposure in environments
  • Monitor for suspicious activity

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional verification is needed to confirm affected versions and environments.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-88085 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-88085

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

  • CVE-2026-88085 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-88085

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

Supplemental references

  • Microsoft SQL Server Elevation of Privilege Vulnerability

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/88xxx/CVE-2026-88085.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88085

    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.