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CVE-2026-78456— SQL Server Remote Code Execution Vulnerability

Quick assessment

Affected

Microsoft Microsoft SQL Server 2022 (CU 26)

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft SQL Server是美国Microsoft公司的一套应用在Microsoft Windows系统下的大型商业数据库系统。 Microsoft SQL Server 2022 (CU 26) 16.0.0.0至16.0.4275.2之前版本和Microsoft SQL Server 2022 (GDR) 16.0.0至16.0.1200.5之前版本存在缓冲区错误漏洞，该漏洞源于堆缓冲区溢出，可能导致授权攻击者通过网络执行代码。

CVSS 8.8 · High EPSS 0.91% · P60 Updated Oct 15, 2026

Possible ATT&CK Techniques 2 AI

T1068 · Exploitation for Privilege Escalation T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

Vendor	Product	Version Range	Status
Microsoft	Microsoft SQL Server 2022 (CU 26)	`16.0.0.0< 16.0.4275.2`	affected
Microsoft	Microsoft SQL Server 2022 (GDR)	`16.0.0< 16.0.1200.5`	affected

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I. Basic Information for CVE-2026-78456

Vulnerability Information

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Vulnerability Title

SQL Server Remote Code Execution Vulnerability

Source: CVE Program / CVE List V5

Vulnerability Description

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

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

堆缓冲区溢出

Source: CVE Program / CVE List V5

Vulnerability Title

Microsoft SQL Server 缓冲区错误漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Microsoft	Microsoft SQL Server 2022 (CU 26)	16.0.0.0 ~ 16.0.4275.2	-
Microsoft	Microsoft SQL Server 2022 (GDR)	16.0.0 ~ 16.0.1200.5	-

II. Public POCs for CVE-2026-78456

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-78456

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Vendor Advisories for CVE-2026-78456 (1)

🔗 CVE-2026-78456 - Security Update Guide - Microsoft - SQL Server Remote Code Execution Vulnerability Read full article vendor-advisory patch

https://www.cve.org/CVERecord?id=CVE-2026-78456

Same Patch Batch · Microsoft · 2026-09-08 · 966 CVEs total

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CVE-2026-69829	9.8 CRITICAL	Windows Shell Remote Code Execution Vulnerability
CVE-2026-69845	9.8 CRITICAL	Windows DHCP Server Remote Code Execution Vulnerability
CVE-2026-69769	9.8 CRITICAL	Windows HTTP Print Provider Remote Code Execution Vulnerability
CVE-2026-69276	9.8 CRITICAL	Microsoft UxTheme Library (uxtheme.dll) Remote Code Execution Vulnerability
CVE-2026-72982	9.8 CRITICAL	Windows Netlogon Remote Code Execution Vulnerability
CVE-2026-67631	9.8 CRITICAL	Microsoft SQL Server Remote Code Execution Vulnerability
CVE-2026-72983	9.8 CRITICAL	Internet Connection Sharing (ICS) Remote Code Execution Vulnerability

Showing top 20 of 966 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Microsoft SQL Server 2022 (CU 26)

Same vendor: Microsoft

Same weakness: CWE-122