---
id: "CVE-2026-88222"
page: "https://infrastack.ai/live/CVE-2026-88222"
kind: "vulnerability"
aliases: ["CVE-2026-88222"]
title: "Microsoft WDAC OLE DB provider for SQL: heap overflow lets a malicious server run code on a connecting client"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["client-side", "infrastructure", "ole-db", "sql-server", "wdac", "windows"]
not_affected_if: ["no-untrusted-sql-connections"]
published_at: "2026-11-10T19:21:30+00:00"
first_seen_at: "2026-11-10T19:25:19+00:00"
updated_at: "2026-11-10T20:47:58+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-88222", "first_seen_at": "2026-11-10T19:25:19+00:00"}, {"source": "analyst", "url": "https://api.msrc.microsoft.com/sug/v2.0/en-US/vulnerability/CVE-2026-88222", "first_seen_at": "2026-11-10T20:47:58+00:00", "cites": ["https://api.msrc.microsoft.com/sug/v2.0/en-US/vulnerability/CVE-2026-88222"]}]
exploit_sources: []
---

# Microsoft WDAC OLE DB provider for SQL: heap overflow lets a malicious server run code on a connecting client

Link for people: https://infrastack.ai/live/CVE-2026-88222 (this .md is for agents)

MSRC (Nov 2026 Patch Tuesday, published 2026-11-10) rates this Important, CVSS 8.8, CWE-122. Per MSRC's FAQ, an attacker hosts a malicious server and convinces a user to connect to it from an affected client; processing the server's response can run code on the client. User interaction is required. MSRC says not publicly disclosed, not exploited, 'Exploitation Less Likely'.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-11-10T19:25:19+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-88222
- 2026-11-10T20:47:58+00:00 analyst https://api.msrc.microsoft.com/sug/v2.0/en-US/vulnerability/CVE-2026-88222 — MSRC SUG API record read (the web page needs JavaScript). It gives no affected builds, KB or fix, and no mitigation. Fix and how-to-check stay unknown. Open the MSRC page in a browser or check the Nov 2026 KB list to settle them. Only who_affected was verified.

## Documents

- [advisory] MSRC: CVE-2026-88222 Microsoft WDAC OLE DB provider for SQL RCE https://api.msrc.microsoft.com/sug/v2.0/en-US/vulnerability/CVE-2026-88222

## From the sources

Heap-based buffer overflow in Microsoft WDAC OLE DB provider for SQL allows an unauthorized attacker to execute code over a network.

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_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_