CVE-2026-67643: Microsoft SQL Server Remote Code Execution Vulnerability
Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.
Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67643
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-676430.83% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 56% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-67643 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- high[NEU] [hoch] Microsoft SQL Server: Mehrere Schwachstellencert-bund
- unknownMultiples vulnérabilités dans les produits Microsoft (09 septembre 2026)cert-fr-avis
- unknownNCSC-2026-0350 [1.00] [M/H] Kwetsbaarheden verholpen in SQL Serverncsc-nl
- highCVE-2026-67643: 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
- highCVE-2026-67631: Microsoft SQL Server Remote Code Execution Vulnerabilitymsrc · 2026-09-08
- highCVE-2026-77486: Microsoft SQL Server Remote Code Execution Vulnerabilitymsrc · 2026-09-08
- highCVE-2026-47297: Microsoft SQL Server Remote Code Execution Vulnerabilitymsrc · 2026-09-08
- mediumCVE-2026-68776: Microsoft SQL Server Information Disclosure Vulnerabilitymsrc · 2026-09-08
- mediumCVE-2026-68784: Microsoft SQL Server Information Disclosure Vulnerabilitymsrc · 2026-09-08
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