CVE-2026-78442

Published: Sep 8, 2026Modified: Sep 23, 2026

8.8

Vector

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

Exploitability: 2.8 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

Description

Heap-based buffer overflow in Windows OLE DB allows an unauthorized attacker to execute code over a network.

Affected (4)

Products: Microsoft: Sql Server 2017, Sql Server 2019

2 products

Sql Server 2017

Sql Server 2019

Configuration A

4 vulnerable

Vulnerable Software	Affected Versions
Microsoft Sql Server 2017	version < 14.0.2130.4
Microsoft Sql Server 2017	14.0.3006.16 ≤ version < 14.0.3550.4
Microsoft Sql Server 2019	version < 15.0.2190.7
Microsoft Sql Server 2019	15.0.4003.23 ≤ version ≤ 15.0.4490.9

Related CWEs

Heap-based Buffer Overflow

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78442

Source: secure@microsoft.com

Vendor AdvisoryPatch

Timeline

No history available yet.