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Vulnerabilities/CVE-2026-88083Public Intelligence Dossier
Source: Microsoft · Limited verification•Last verified: •Collection Degraded
CVE-2026-88083Unknown / EvaluatingImportant (raw)CVSS 7.5CWE-121

Microsoft SQL Server Remote Code Execution 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 available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Unknown
KEV status was not determined.
CVSS score
7.5Important (raw)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Metric sourceMicrosoft MSRC CVRF
EPSS probability
0.3%0.003
Percentile27th
Weakness type
CWE-121
No further CWE recorded
Remediation
Patch status unknown
KB5128493, KB5128492, KB5126934, KB5126967

Why It Matters

Analysis dossier

Why It Matters

Stack-based buffer overflow in SQL Server allows an unauthorized attacker to execute code 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

6 source-backed products
Affected products and versions (source)
  • Microsoft SQL Server 2022 for x64-based Systems (CU 26) · 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
  • Microsoft SQL Server 2025 for x64-based Systems (CU8) · 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 2022 for x64-based Systems (CU27) · 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
Recorded patch / KBKB5128493, KB5128492, KB5126934, KB5126967

Vendor or catalog guidance (source)

  • Microsoft MSRC: Install the security update KB5128493 listed by MSRC
  • Microsoft MSRC: Install the security update KB5128492 listed by MSRC
  • Microsoft MSRC: Install the security update KB5126934 listed by MSRC
  • Microsoft MSRC: Install the security update KB5126967 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.

Matched user-interaction-client (CVSS AV:N, CVSS UI:R)

Exposure

  1. Identify endpoints reporting this CVE, especially those used for email and web browsing.Telemetry: DeviceTvmSoftwareVulnerabilities · A network vector that needs user interaction points at user-facing client software. · Rule user-interaction-client

Exploitation evidence

  1. Review unusual child processes started by the affected client application on affected endpoints.Telemetry: DeviceProcessEvents · Hunting hypothesis from the CVSS vector; it does not show that exploitation occurred. · Rule user-interaction-client

Response

  1. Confirm the source-stated update on affected endpoints.Telemetry: DeviceTvmSoftwareVulnerabilities · A follow-up inventory check verifies remediation. · Rule user-interaction-client

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-2026-88083
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2026-88083
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2026-88083"| 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.