CVE-2026-67373: CWE-122: Heap-based Buffer Overflow in Microsoft Microsoft SQL Server 2025 (CU8)
Description
CVE-2026-67373 is a heap-based buffer overflow vulnerability in Microsoft SQL Server 2025 (CU8) that allows an authorized attacker to execute code remotely over a network. The vulnerability affects specific builds of version 17.0.0.0 and later, up to but not including 17.0.4085.5 and 17.0.1135.8. It has a high severity with a CVSS score of 8.8. An official fix is available from Microsoft.
CVSS v3.1
Score 8.8high
Affected software
Microsoft
Microsoft SQL Server 2025 (CU8)
Microsoft
Microsoft SQL Server 2025 for x64-based Systems (GDR)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-67373) is a heap-based buffer overflow in Microsoft SQL Server 2025 (CU8) that can be exploited by an authorized attacker to execute arbitrary code remotely over a network. The affected versions are 17.0.0.0 and later, but prior to 17.0.4085.5 and 17.0.1135.8. The CVSS v3.1 base score is 8.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability as detailed in their security update guide.
Potential Impact
Successful exploitation allows an authorized attacker to execute arbitrary code remotely, potentially leading to full compromise of the affected SQL Server instance. The vulnerability impacts confidentiality, integrity, and availability of the system. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security updates provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67373 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-29T14:57:03.840Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67373","vendor":"Microsoft"}]
Threat ID: 6aa044c9acd9273b49fa7b38
Added to database: 09/08/2026, 17:24:25 UTC
Last enriched: 10/16/2026, 20:50:27 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 28
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