CVE-2026-67638: Microsoft SQL Server Remote Code Execution Vulnerability

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

high — CVSS 8.8

Published

2026-09-08

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67638

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• unknownNCSC-2026-0350 [1.00] [M/H] Kwetsbaarheden verholpen in SQL Serverncsc-nl
• highCVE-2026-67638: Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a …nvd

Recent advisories for Microsoft SQL Server

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

• high[NEU] [hoch] Microsoft SQL Server: Mehrere Schwachstellencert-bund · 2026-09-09
• mediumCVE-2026-66816: Microsoft SQL Server Security Feature Bypass Vulnerabilitymsrc · 2026-09-08
• highCVE-2026-67368: Microsoft SQL Server Elevation of Privilege Vulnerabilitymsrc · 2026-09-08
• mediumCVE-2026-67369: Microsoft SQL Server Information Disclosure Vulnerabilitymsrc · 2026-09-08
• highCVE-2026-67373: Microsoft SQL Server Remote Code Execution Vulnerabilitymsrc · 2026-09-08
• highCVE-2026-66814: Microsoft SQL Server Elevation of Privilege Vulnerabilitymsrc · 2026-09-08

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