Microsoft SQL Server: Elevation of privilege through untrusted pointer dereference
Summary
An untrusted pointer dereference in Microsoft SQL Server allows an authenticated attacker to elevate privileges over the network. The attacker needs a valid low-privilege account, but needs no user interaction. Successful exploitation could compromise confidentiality, integrity and availability of the database server according to the CVSS vector.
Affected
- Microsoft SQL Server 2017 (GDR): 14.0.0 to before 14.0.2150.2
- Microsoft SQL Server 2017 for x64-based Systems (CU31): 14.0.3006.16 to before 14.0.3570.2
- Microsoft SQL Server 2019 (GDR): 15.0.0 to before 15.0.2210.4
- Microsoft SQL Server 2019 for x64-based Systems (CU32): 15.0.4003.23 to before 15.0.4510.2
- Microsoft SQL Server 2022 (GDR): 16.0.0 to before 16.0.1220.3
- Microsoft SQL Server 2022 for x64-based Systems (CU27): 16.0.4003.1 to before 16.0.4315.2
- Microsoft SQL Server 2025 CU10: 17.0.4006.0 to before 17.0.5045.3
- Microsoft SQL Server 2025 for x64-based Systems (GDR): 17.0.1050.2 to before 17.0.1155.3
Fixed in
Unknown. The CNA record lists the upper bound of each affected range as the first unaffected build. Microsoft's KB article for this CVE was not verified.
Workaround
Unknown.
Exploitation
Unknown. No reports of exploitation in the wild and no public proof of concept were found at the time of writing.
Our recommendation
- Identify all SQL Server instances and their exact builds, and compare them with the affected ranges.
- Install the latest cumulative update or GDR for your SQL Server version as soon as Microsoft confirms the fixed build.
- Limit administrative and high-privilege database accounts and remove unneeded logins.
- Make sure SQL Server is not reachable from the internet.
Information from Microsoft (Patch Tuesday November 2026)
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Update Guide: CVE-2026-67387 msrc.microsoft.com
- Microsoft KB5122768: SQL Server 2022 CU26 GDR, September 2026 support.microsoft.com
- Microsoft Q&A: SQL Server Elevation of Privilege vulnerability learn.microsoft.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 10 Nov 2026, 21:03.
Original description (NVD)
Untrusted pointer dereference in SQL Server allows an authorized attacker to elevate privileges over a network.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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