CVE-2026-94513: Microsoft SQL Server heap-based buffer overflow

CVE-2026-94513 · Severity: high · CVSS 8 · Published 2026-11-10

Microsoft SQL Server contains a heap-based buffer overflow vulnerability that allows an authenticated attacker to escalate their privileges and execute arbitrary code on the system. This vulnerability is remotely exploitable, meaning an attacker with valid database credentials can compromise the entire SQL Server instance and the data it manages.

Technologies: Microsoft SQL Server. Vendors: Microsoft.

Quick answers

Is CVE-2026-94513 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-94513 being exploited in the wild.
How severe is CVE-2026-94513?
High severity, with a CVSS score of 8, published 10 November 2026.
Which products and versions are affected?
Microsoft SQL Server <UNKNOWN>.
Is there a fix for CVE-2026-94513?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-94513 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-94513?
Check whether you run Microsoft SQL Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A heap-based buffer overflow in SQL Server enables an authenticated attacker to overflow a heap buffer and overwrite adjacent memory structures. The vulnerability is triggered through network-accessible SQL Server services when the attacker possesses valid credentials, and successful exploitation results in privilege escalation or arbitrary code execution in the context of the SQL Server process.

Affected products

  • Microsoft SQL Server <UNKNOWN>

Timeline

  • 2026-11-10: disclosed

References

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