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CVE-2026-65669: Microsoft SQL Server Elevation of Privilege Vulnerability

• Severity: critical (CVSS 9.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-08 · updated 2026-10-31
• Weakness: CWE-74

Description

Improper neutralization of special elements in output used by a downstream component ('injection') in SQL Server allows an unauthorized attacker to elevate privileges over a network.

Affected products

• Microsoft SQL Server Management Studio: from 22.0 before 22.8.2 — fixed in 22.8.2
• Microsoft SQL Server Management Studio: from 22.0 before 22.8.2 — fixed in 22.8.2

How to fix

Upgrade to a fixed version: Microsoft SQL Server Management Studio 22.8.2; Microsoft SQL Server Management Studio 22.8.2. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65669

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