CVE intelligence

CVE-2026-83945

Vulnerability intelligence

Published Oct 13, 2026Sources checked Oct 21, 2026

6.6MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2026-83945 and is rated Medium severity with a CVSS score of 6.6. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Oct 13, 2026

Vendor remediation details

Install KB5128492. Install KB5128493. Install KB5126934. Install KB5126967.

Vendor-listed releases

17.0.1145.4
16.0.1210.3
16.0.4305.5
17.0.5015.4

CISA KEVNot listedBased on the latest collected catalog

EPSS0.4%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-83945?

Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.

Source: NVD