Microsoft SQL Server: Information disclosure through out-of-bounds read
Summary
An out-of-bounds read in Microsoft SQL Server 2017, 2019, 2022 and 2025 allows an authorized attacker to read information from the database over the network. The attacker needs a valid low-privilege account, and user interaction is required; the impact is limited to confidentiality. Microsoft fixed the issue in its security updates of November 10, 2026.
Affected
- SQL Server 2017 GDR: 14.0.0 to before 14.0.2150.2
- SQL Server 2017 CU31 (x64): 14.0.3006.16 to before 14.0.3570.2
- SQL Server 2019 GDR: 15.0.0 to before 15.0.2210.4
- SQL Server 2019 CU32 (x64): 15.0.4003.23 to before 15.0.4510.2
- SQL Server 2022 GDR: 16.0.0 to before 16.0.1220.3
- SQL Server 2022 CU27 (x64): 16.0.4003.1 to before 16.0.4315.2
- SQL Server 2025 CU10: 17.0.4006.0 to before 17.0.5045.3
- SQL Server 2025 GDR (x64): 17.0.1050.2 to before 17.0.1155.3
Fixed in
- SQL Server 2017 GDR: 14.0.2150.2 (KB5132749)
- SQL Server 2017 CU31: 14.0.3570.2 (KB unverified)
- SQL Server 2019 GDR: 15.0.2210.4 (KB5132751)
- SQL Server 2019 CU32: 15.0.4510.2 (KB unverified)
- SQL Server 2022 GDR: 16.0.1220.3 (KB unverified)
- SQL Server 2022 CU27: 16.0.4315.2 (KB unverified)
- SQL Server 2025 CU10: 17.0.5045.3 (KB5129299)
- SQL Server 2025 GDR: 17.0.1155.3 (KB unverified)
Workaround
Unknown. No workaround was found; apply the security update.
Exploitation
- Not known to be exploited in the wild.
- Microsoft's exploitability assessment is "Exploitation Less Likely."
- No public proof of concept was found.
Our recommendation
- Identify all SQL Server instances and their build numbers.
- Patch each branch (GDR and CU lines) to the fixed build and confirm the KB on the MSRC entry.
- Restrict database access to required application servers and keep accounts at least privilege.
- Do not expose SQL Server to 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 MSRC Security Update Guide: CVE-2026-116939 msrc.microsoft.com
- Microsoft KB5132749: SQL Server 2017 GDR support.microsoft.com
- Microsoft KB5132751: SQL Server 2019 GDR support.microsoft.com
- Microsoft KB5129299: SQL Server 2025 CU10 support.microsoft.com
- CVE-2026-116939 details (threatint) cve.threatint.com
- CVE-2026-116939 details (Strix) www.strix.ai
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 11 Nov 2026, 15:46.
Original description (NVD)
Out-of-bounds read in SQL Server allows an authorized attacker to disclose information 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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