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Vulnerabilities/CVE-2026-66820Public Intelligence Dossier
Source: Microsoft · Limited verification•Last verified: •Collection Degraded
CVE-2026-66820Unknown / EvaluatingImportant (raw)CVSS 8.8

SQL Server Elevation of Privilege Vulnerability

Published: 08 Sept 2026•Last updated: 08 Sept 2026, 12:30 PM IST•Source identifier: Unknown
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
8.8Important (raw)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Metric sourceMicrosoft MSRC CVRF
EPSS probability
1%0.010
Percentile62nd
Weakness type
—
No further CWE recorded
Remediation
Patch status unknown
KB5122775, KB5122773, KB5122774, KB5122771, KB5122770, KB5122772, KB5122768, KB5122769

Why It Matters

Analysis dossier

Why It Matters

Improper neutralization of special elements used in an sql command ('sql injection') in SQL Server allows an authorized attacker to elevate privileges over a network.

SOC priority

Medium

Actively exploited

No

Publicly disclosed

Unknown

Risk basis: 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 (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 2017 for x64-based Systems (CU 31) · 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 (GDR) · version range not provided by source · Microsoft MSRC · Source
  • Microsoft SQL Server 2019 for x64-based Systems (CU 32) · version range not provided by source · Microsoft MSRC · Source
  • Microsoft SQL Server 2022 for x64-based Systems (CU 26) · 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
Recorded patch / KBKB5122775, KB5122773, KB5122774, KB5122771, KB5122770, KB5122772, KB5122768, KB5122769

Vendor or catalog guidance (source)

  • Microsoft MSRC: Install the security update KB5122775 listed by MSRC
  • Microsoft MSRC: Install the security update KB5122773 listed by MSRC
  • Microsoft MSRC: Install the security update KB5122774 listed by MSRC
  • Microsoft MSRC: Install the security update KB5122771 listed by MSRC
  • Microsoft MSRC: Install the security update KB5122770 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
Unknown
Record status · verification
UPDATED · Unknown
CPE
Unknown

Evidence & Provenance

1 public source
api.msrc.microsoft.comSource record
Detection Hunting Query

— No published hunting query names this record. Browse community and library queries instead.

Open KQL Library

Correlated briefings

Microsoft Security Update Guide · Limited verificationSeptember 2026 Security UpdatesPublished 08 Sept 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.