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CVE-2026-88088 Microsoft CVE debrief

Microsoft SQL Server Elevation of Privilege Vulnerability allows an authorized attacker to elevate privileges locally due to an integer overflow or wraparound in SQL Server. The CVE record was published on 2026-10-13T20:37:23.763Z and has not been modified since then. The NVD entry is currently High with a CVSS score of 7. This vulnerability impacts SQL Server deployments, allowing local privilege escalation. Defenders should assess exposure and prioritize patching to prevent potential attacks.

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 should assess exposure and prioritize patching. This includes IT security teams, database administrators, and system operators who manage SQL Server environments. They should verify affected versions and apply patches to prevent local privilege escalation attacks. Additionally, security teams should monitor for potential exploitation attempts and review SQL 7

Why it matters

CVE-2026-88088 allows authorized attackers to elevate privileges locally in Microsoft SQL Server due to an integer overflow or wraparound. Defenders should verify affected versions and apply patches to prevent local privilege escalation.

  • Local privilege escalation is possible
  • Authorized attackers can elevate privileges
  • SQL Server deployments require verification and patching

Technical summary

The vulnerability is caused by an integer overflow or wraparound in SQL Server, allowing an authorized attacker to elevate privileges locally. This issue affects Microsoft SQL Server, enabling attackers with local access to potentially escalate privileges. The vulnerability's technical details involve the improper handling of integer values, leading to a wraparound that can be exploited for privilege escalation.

Defensive priority

Defenders should prioritize verifying affected versions and applying patches, as the vulnerability allows for local privilege escalation.

Recommended defensive actions

  • Verify affected versions of Microsoft SQL Server
  • Apply patches from Microsoft
  • Monitor for local privilege escalation attempts

Evidence notes

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

Sources and references

Verified primary and authoritative sources

  • CVE-2026-88088 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-88088

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

  • CVE-2026-88088 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-88088

    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-2026-88088.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88088

    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.