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Vulnerability record · CVE-2026-67373 · published 8 September 2026

CVE-2026-67373: Microsoft sql server 2025 heap-based buffer overflow vulnerability

Microsoft · Sql Server 2025

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

8.8 CVSS 3.1 High EPSS 0.91% · top 41.5% CWE-122 · Heap-based buffer overflow
8.8CVSS 3.1 base score
0.91%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
16 Sep 2026Last modified by NVD

Description

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

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

Affected products

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

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67373 Vendor AdvisoryPatch

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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%9.0CVE-2026-67636Microsoft sql server 2019 out-of-bounds read vulnerabilityOut-of-bounds read in SQL Server allows an unauthorized attacker to execute code over a network.EPSS 0.71%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-2026-77484Microsoft sql server 2019 deserialization of untrusted data vulnerabilityDeserialization of untrusted data in SQL Server allows an authorized attacker to execute code over a network.EPSS 1.7%8.8CVE-2026-77487Microsoft sql server 2017 improper access control vulnerabilityImproper access control in SQL Server allows an authorized attacker to elevate privileges over a network.EPSS 0.78%

Source: NIST National Vulnerability Database (record CVE-2026-67373), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.