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CVE-2026-88082 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 affects Microsoft SQL Server deployments, particularly those with local access or elevated privileges. Defenders should assess exposure and apply patches for affected versions, including Microsoft SQL Server 2019 (GDR), Microsoft SQL Server 2019 for x64-based Systems (CU32), Microsoft SQL Server 2022 (GDR), Microsoft SQL Server 2022 for x64-based Systems (CU27), Microsoft SQL Server 2025 (CU8), Microsoft SQL Server 2025 for x64-based Systems (CU9), and Microsoft SQL Server 2025 for x64-based Systems (GDR).

Vendor
Microsoft
Product
Microsoft SQL Server 2019 (GDR)
CVSS
HIGH 7
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, particularly those with local access or elevated privileges, should assess exposure and apply patches.

Why it matters

CVE-2026-88082 allows an authorized attacker to elevate privileges locally due to a heap-based buffer overflow in Microsoft SQL Server. Defenders should prioritize verifying exposure and applying patches for affected versions.

  • Verify exposure of Microsoft SQL Server instances to this vulnerability
  • Apply patches for affected Microsoft SQL Server versions
  • Monitor for potential local privilege elevation attempts

Technical summary

A heap-based buffer overflow in Microsoft SQL Server allows an authorized attacker to elevate privileges locally. Affected versions include Microsoft SQL Server 2019 (GDR), Microsoft SQL Server 2019 for x64-based Systems (CU32), Microsoft SQL Server 2022 (GDR), Microsoft SQL Server 2022 for x64-based Systems (CU27), Microsoft SQL Server 2025 (CU8), Microsoft SQL Server 2025 for x64-based Systems (CU9), and Microsoft SQL Server 2025 for x64-based Systems (GDR).

Defensive priority

Defenders should prioritize verifying exposure and applying patches for Microsoft SQL Server 2019 (GDR), Microsoft SQL Server 2019 for x64-based Systems (CU32), Microsoft SQL Server 2022 (GDR), Microsoft SQL Server 2022 for x64-based Systems (CU27), Microsoft SQL Server 2025 (CU8), Microsoft SQL Server 2025 for x64-based Systems (CU9), and Microsoft SQL Server 2025 for x64-based Systems (GDR).

Recommended defensive actions

  • Verify exposure of Microsoft SQL Server instances to this vulnerability
  • Apply patches for affected Microsoft SQL Server versions
  • Monitor for potential local privilege elevation attempts
  • Review and update inventory of Microsoft SQL Server deployments

Evidence notes

The CVE record and source item provide details on the vulnerability, but limited information is available on exploitation or impact. The vulnerability is based on a heap-based buffer overflow in Microsoft SQL Server, which allows an authorized attacker to elevate privileges locally. Defenders should verify exposure of Microsoft SQL Server instances to this vulnerability and apply patches for affected Microsoft SQL Server versions. The CVE Program record (cve-org) and NIST NVD detail (n

Sources and references

Verified primary and authoritative sources

  • CVE-2026-88082 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-88082

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

  • CVE-2026-88082 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-88082

    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-2026-88082.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88082

    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.