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SQL Server 2016 SP3 AC + GDR SQL Server 2016 SP3 AC + GDR Security update
Patch Tuesday Final update for this version

KB5102339

KB5102339: Security update for SQL Server 2016, Azure Connect Feature Pack branch, July 2026. Untrusted MSMQ messages blocked from triggering code execution

In short

The update patches SQL Server security vulnerabilities, including a critical remote code execution flaw. Linked-server queries using MSDASQL can still fail with error 7416 in certain configurations.

Does it affect you? Applies to: The x64 update is for SQL Server 2016 SP3 systems with the Azure Connect Feature Pack installed.

Build
13.0.7095.1
Servicing branch
Azure Connect Feature Pack
Security
4 fixed · 1 critical
Restart
Required

For servers on the Azure Connect Feature Pack of Service Pack 3, the branch with fixes beyond security. Servers on the GDR branch (security fixes only) get a separate update. Which branch am I on?

What changes

Fixes 4 changes

Integration Services

  • Untrusted Microsoft Message Queuing messages can no longer trigger remote code execution through MessageQueueTask deserialization.1
    Restricts SoapFormatter deserialization with an allow list binder.

Query Execution

  • Using the input-buffer function or command no longer causes a memory leak.2
    Fixes a memory leak when using the sys.dm_exec_input_buffer dynamic management function or the DBCC INPUTBUFFER command.

Replication

  • Input passed to an internal replication stored procedure is validated and sanitized before the procedure uses it.3

SQL Agent

  • Resolves a SQL injection vulnerability that could let an authenticated attacker elevate privileges over a network.4
    The vulnerability involves improper neutralization of special elements in SQL Server commands.

Known issues

  1. Open Affects: Organizations and IT administrators

    Linked server queries that use MSDASQL fail with error 7416

    Linked-server queries using the MSDASQL provider and a provider string can fail with error 7416 in certain configurations, even if earlier builds allowed the connection.5

    Workaround status No workaround yet

    Microsoft has not published a manual workaround for this issue yet. Monitor release health until a resolving update is available.

Technical details

Data sheet · Security · Downloads · Components Click to collapse or expand

Data sheet

Released
2026-07-14
Classification
Security Updates
Type
Cumulative update
Servicing branch
Azure Connect Feature Pack
Restart
Required
Replaces
KB5089270, KB5084820, KB5077473, KB5068400
+7 earlier KB5065227, KB5063761, KB5058717, KB5046856, KB5046062, KB5042209, KB5040944
VersionBuildChannel
2016 13.0.7095.1 General availability

Security

4 vulnerabilities fixed
1 critical 3 important
VulnerabilitySeverityCVSS
CVE-2026-54118
Microsoft SQL Server Remote Code Execution Vulnerability
 Critical 9.8
CVE-2026-47295
Microsoft SQL Server Elevation of Privilege Vulnerability
 Important 8.8
CVE-2026-55002
Microsoft SQL Server Elevation of Privilege Vulnerability
 Important 8.8
CVE-2026-47296
Microsoft SQL Server Elevation of Privilege Vulnerability
 Important 7.5

Downloads (Microsoft Update Catalog)

Package 2016
508.3 MB
sqlserver2016-kb5102339-x64.exe Main update · KB5102339 SHA-1: 2b79b2af…fd5acf

Updated components

512 files changed since the previous update for the same versions.

Top changed componentsFiles
SQL Server Engine77
SQL Server PolyBase1

Sources

Updated
Cited passages from Microsoft's official notes (5)
  1. 1. This fix resolves an insecure deserialization vulnerability in MessageQueueTask by restricting SoapFormatter deserialization that uses an allow list binder. support.microsoft.com
  2. 2. This fix resolves a memory leak that occurs if the sys.dm_exec_input_buffer dynamic management function (DMF) or the DBCC INPUTBUFFER command is used. support.microsoft.com
  3. 3. This fix addresses input validation and sanitization of user input for a parameter that's passed to an internal replication stored procedure by validating and sanitizing the input before the stored procedure uses it. support.microsoft.com
  4. 4. This fix resolves an SQL injection vulnerability in SQL Server in which improper neutralization of special elements in SQL Server commands allows an authenticated attacker to elevate privileges over a network. support.microsoft.com
  5. 5. Linked server queries that use the MSDASQL (OLE DB Provider for ODBC Drivers) provider and specify a provider string (@provstr) fail and return the following error message: support.microsoft.com
Checked automatically: 8 of 8 checks passed, 5 quoted passages · compared with Microsoft's page on Sep 26, 2026
  • Quotes found in the official pages: passed
  • Numbers found in the sources: passed
  • Vulnerabilities from the dossier only: passed
  • Links to allowed domains only: passed
  • Every official change covered: passed
  • Readable plain text: passed
  • Changes confirmed by the file list: passed
  • Sources agree: passed

A second AI read the text against the sources: correctness 5/5, clarity 5/5, completeness 5/5. How we work

Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake