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Vulnerabilities/CVE-2026-96956Public Intelligence Dossier
Source: Microsoft · Limited verification•Last verified: •Collection Running
CVE-2026-96956Unknown / EvaluatingImportant (raw)CVSS 8.0CWE-121

SQL Server Elevation of Privilege Vulnerability

Published: 13 Oct 2026•Last updated: 13 Oct 2026, 12:30 PM IST•Source identifier: secure@microsoft.com
Dossier completeness: source-provided sections 3 / 3 · rule guidance not available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Unknown
KEV status was not determined.
CVSS score
8.0Important (raw)
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
Metric sourceMicrosoft MSRC CVRF
EPSS probability
0.4%0.004
Percentile35th
Weakness type
CWE-121
No further CWE recorded
Remediation
Patch status unknown
KB5128496, KB5128497, KB5128495, KB5126934, KB5128492, KB5126967, KB5128494, KB5128493

Why It Matters

Analysis dossier

Why It Matters

Stack-based buffer overflow in SQL Server allows an authorized attacker to elevate privileges over a network.

SOC priority

High

Actively exploited

No

Publicly disclosed

Unknown

Risk basis: Microsoft or Microsoft-managed product relevance; HIGH severity; No confirmed exploitation signal in current enrichment

Affected Products & Remediation

8 source-backed products
Affected products and versions (source)
  • Microsoft SQL Server 2017 for x64-based Systems (CU31) · version range not provided by source · Microsoft MSRC · Source
  • Microsoft SQL Server 2017 for x64-based Systems (GDR) · version range not provided by source · Microsoft MSRC · Source
  • Microsoft SQL Server 2019 for x64-based Systems (GDR) · version range not provided by source · Microsoft MSRC · Source
  • Microsoft SQL Server 2022 for x64-based Systems (CU27) · version range not provided by source · Microsoft MSRC · Source
  • Microsoft SQL Server 2025 for x64-based Systems (GDR) · version range not provided by source · Microsoft MSRC · Source
  • Microsoft SQL Server 2025 for x64-based Systems (CU9) · version range not provided by source · Microsoft MSRC · Source
  • Microsoft SQL Server 2019 for x64-based Systems (CU32) · version range not provided by source · Microsoft MSRC · Source
  • Microsoft SQL Server 2022 for x64-based Systems (GDR) · version range not provided by source · Microsoft MSRC · Source
Recorded patch / KBKB5128496, KB5128497, KB5128495, KB5126934, KB5128492, KB5126967, KB5128494, KB5128493

Vendor or catalog guidance (source)

  • Microsoft MSRC: Install the security update KB5128496 listed by MSRC
  • Microsoft MSRC: Install the security update KB5128497 listed by MSRC
  • Microsoft MSRC: Install the security update KB5128495 listed by MSRC
  • Microsoft MSRC: Install the security update KB5126934 listed by MSRC
  • Microsoft MSRC: Install the security update KB5128492 listed by MSRC

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Unknown
Exploited (source statement)
No
Publicly disclosed (source)
Unknown

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

No rule-based guidance for this vulnerability class

CISA KEV Record

CISA KEV status was not determined for this record.

Change History & Source Data

— No recorded material change

CNA / source
secure@microsoft.com
Record status · verification
UPDATED · Unknown
CPE
Unknown

Evidence & Provenance

3 public sources
api.msrc.microsoft.comSource recordnvd.nist.govSource recordmsrc.microsoft.comSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2026-96956
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2026-96956
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2026-96956"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

Correlated briefings

Microsoft Security Update Guide · Limited verificationOctober 2026 Security UpdatesPublished 13 Oct 2026
SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.