CVE-2026-62903
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Authentication Bypass via Capture-Replay in SQL Server
Vulnerability report for CVE-2026-62903, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-11-10
Last updated on: 2026-11-10
Assigner: Microsoft Corporation
Description
Description
Authentication bypass by capture-replay in SQL Server allows an unauthorized attacker to disclose information over a network.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Microsoft | Microsoft.Data.SqlClient 6.1 | From 1.0.0.0 (inc) to 6.1.7 (exc) |
| Microsoft | Microsoft.Data.SqlClient 7.0 | From 1.0.0.0 (inc) to 7.0.3 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-294 | A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes). |
