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Vulnerability record · CVE-2026-67636 · published 8 September 2026

CVE-2026-67636: Microsoft sql server 2019 out-of-bounds read vulnerability

Microsoft · Sql Server 2019

Out-of-bounds read in SQL Server allows an unauthorized attacker to execute code over a network.

9.0 CVSS 3.1 Critical EPSS 0.71% · top 48.5% CWE-125 · Out-of-bounds read
9.0CVSS 3.1 base score
0.71%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
1References
17 Sep 2026Last modified by NVD

Description

Out-of-bounds read in SQL Server allows an unauthorized attacker to execute code over a network.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67636 PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-67643Microsoft sql server 2022 heap-based buffer overflow vulnerabilityHeap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.EPSS 0.97%9.8CVE-2026-67631Microsoft sql server 2017 heap-based buffer overflow vulnerabilityHeap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.EPSS 0.97%9.8CVE-2026-54117Microsoft sql server 2016 deserialization of untrusted data vulnerabilityDeserialization of untrusted data in SQL Server allows an unauthorized attacker to execute code over a network.EPSS 1.5%9.8CVE-2026-54118Microsoft sql server 2016 deserialization of untrusted data vulnerabilityDeserialization of untrusted data in SQL Server allows an unauthorized attacker to execute code over a network.EPSS 1.5%9.8CVE-2024-37980Microsoft sql server 2016 improper privilege management vulnerabilityMicrosoft SQL Server Elevation of Privilege VulnerabilityEPSS 1.4%9.8CVE-2024-37341Microsoft sql 2016 azure connect feature pack improper access control vulnerabilityMicrosoft SQL Server Elevation of Privilege VulnerabilityEPSS 1.4%9.0CVE-2026-67378Microsoft sql server 2019 vulnerabilityUntrusted pointer dereference in SQL Server allows an unauthorized attacker to execute code over a network.EPSS 0.71%8.8CVE-2026-78456Microsoft sql server 2022 heap-based buffer overflow vulnerabilityHeap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.EPSS 0.91%

Source: NIST National Vulnerability Database (record CVE-2026-67636), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.