Microsoft WDAC OLE DB provider for SQL: Heap-based buffer overflow
Summary
The Microsoft WDAC OLE DB provider for SQL, a Windows component, contains a heap-based buffer overflow (CWE-122) that can be exploited over the network. According to the CVE description, an unauthorized attacker can execute code on affected systems. The CVSS vector (UI:R) indicates that user interaction is required, which conflicts with the 'unauthorized' wording, and NVD analysis is still pending.
Affected
- Windows 10 Version 1607 (10.0.14393.0 to before 10.0.14393.9688)
- Windows 10 Version 1809 (10.0.17763.0 to before 10.0.17763.9487)
- Windows 10 Version 21H2 (10.0.19044.0 to before 10.0.19044.7846)
- Windows 10 Version 22H2 (10.0.19045.0 to before 10.0.19045.7846)
- Windows 11 Version 23H2 (10.0.22631.0 to before 10.0.22631.7711)
- Windows 11 Version 24H2 (10.0.26100.0 to before 10.0.26100.9974)
- Windows 11 Version 25H2 (10.0.26200.0 to before 10.0.26200.9974)
- Windows 11 Version 26H1 (10.0.28000.0 to before 10.0.28000.3501)
- Windows 11 Version 26H2 (10.0.26300.0 to before 10.0.26300.9974)
- Windows Server 2016 incl. Server Core (10.0.14393.0 to before 10.0.14393.9688)
- Windows Server 2019 incl. Server Core (10.0.17763.0 to before 10.0.17763.9487)
- Windows Server 2022 (10.0.20348.0 to before 10.0.20348.5870)
Fixed in
Unknown. The fixed build numbers should be taken from the MSRC advisory.
Workaround
- No vendor workaround known.
- Restrict outbound SQL connections (TCP 1433 and similar) to known database servers.
- Allow applications to connect only to trusted SQL servers.
Exploitation
Unknown. No KEV listing or exploitation report was found for this CVE during research.
Our recommendation
- Identify Windows systems that run database clients, especially those with outbound SQL connections, and prioritise them.
- Install the Microsoft security update for your builds as soon as MSRC lists the fix.
- Monitor the MSRC advisory and the CISA KEV catalog for status changes and escalate if exploitation is reported.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Remote code execution – Microsoft WDAC OLE DB provider for SQL
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows, Windows ESU (Extended Security Updates)
- Updates (KB)
- KB5131291, KB5131085, KB5131096, KB5131090, KB5131087, KB5132061
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Update Guide: CVE-2026-88222 msrc.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, 20:57.
Original description (NVD)
Heap-based buffer overflow in Microsoft WDAC OLE DB provider for SQL allows an unauthorized attacker to execute code 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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