Microsoft SQL Server: Information disclosure through out-of-bounds read
Summary
An out-of-bounds read in Microsoft SQL Server allows an authorized attacker to disclose information over the network. The attacker must already hold a high-privilege SQL or database session, and the impact is limited to confidentiality. The CVSS 3.1 base score is 4.9 (medium).
Affected
- SQL Server 2017 (GDR): 14.0.0 before 14.0.2150.2
- SQL Server 2017 for x64-based Systems (CU31): 14.0.3006.16 before 14.0.3570.2
- SQL Server 2019 (GDR): 15.0.0 before 15.0.2210.4
- SQL Server 2019 for x64-based Systems (CU32): 15.0.4003.23 before 15.0.4510.2
- SQL Server 2022 (GDR): 16.0.0 before 16.0.1220.3
- SQL Server 2022 for x64-based Systems (CU27): 16.0.4003.1 before 16.0.4315.2
- SQL Server 2025 CU10: 17.0.4006.0 before 17.0.5045.3
- SQL Server 2025 for x64-based Systems (GDR): 17.0.1050.2 before 17.0.1155.3
Fixed in
- SQL Server 2017 (GDR): 14.0.2150.2 (KB5132749)
- SQL Server 2017 CU31: 14.0.3570.2 (KB5132746, to be verified against the Microsoft KB)
- SQL Server 2019 (GDR) and CU32: Unknown. Check the MSRC page for the exact build.
- SQL Server 2022 (GDR): KB5132747
- SQL Server 2022 CU27: KB5129300
- SQL Server 2025 CU10: KB5129299
- SQL Server 2025 (GDR): KB5132748
Workaround
Unknown. No workaround is documented in the sources reviewed. Patching is the fix.
Exploitation
- Exploited in the wild: Not known.
- Public proof of concept: None found.
- CISA KEV: Not verified.
- Rapid7 rates exploitation as less likely and lists the CVE as not publicly disclosed.
Our recommendation
- Apply the November 2026 security updates for your SQL Server build, using the KB article that matches your branch.
- Restrict network access to SQL Server ports and never expose SQL Server to the internet.
- Limit high-privilege SQL accounts.
- Test cumulative updates before wide rollout: a known access violation issue related to sys.dm_exec_requests during database recovery is described in the CU27 and CU10 KBs.
- Check the MSRC advisory for the 2019 fixed builds and verify the NVD entry once analysis is complete.
- Apply the full cumulative update, as the same release contains more serious SQL Server flaws.
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 Response Center: CVE-2026-116940 msrc.microsoft.com
- CVE Record CVE-2026-116940 www.cve.org
- KB5132749: SQL Server 2017 GDR support.microsoft.com
- KB5132747: SQL Server 2022 GDR support.microsoft.com
- KB5129300: SQL Server 2022 CU27 support.microsoft.com
- KB5129299: SQL Server 2025 CU10 support.microsoft.com
- KB5132748: SQL Server 2025 GDR support.microsoft.com
- Rapid7 Patch Tuesday November 2026 www.rapid7.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 11 Nov 2026, 19:40.
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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