Patch tracker / KB5128496
KB5128496: SQL Server 2017 Security Update (October 2026)
KB5128496 is a High security update for SQL Server 2017, released 2026-10-13. It closes 9 CVEs with a maximum CVSS of 8.5. Microsoft documents 1 known issue for this update, quoted below.
Before you deploy: Microsoft lists 1 known issue for this update.
Our data comes from Microsoft, CISA and other public sources, and it can be wrong or out of date. If you are unsure, check the linked source before you act, and tell us when we are wrong so we can fix it.
Update summary
Fixes 9 CVEs. Most severe CVSS 8.5 (High). EPSS exploit probability up to <1%. Among the lower half of tracked Microsoft updates by EPSS exploit probability.
A newer security update for Microsoft SQL Server 2017 for x64-based Systems (CU31) has shipped since this one: KB5132746 (2026-11-10). For cumulative update families the newer package includes these fixes, so installing that one is usually the shorter path. Verify against your own update rings before you skip this package.
Microsoft documents 1 known issue with this update.
- Linked server queries that use MSDASQL fail with error 7416
Senserva AI Opinion and rich prompt for KB5128496
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5128496
- Released
- 2026-10-13
- Last changed
- 2026-11-10
- Changes tracked
- 4
Senserva began recording day-to-day change history on 2026-07-07, and refreshes it several times a day. Release dates are historical where Microsoft publishes them; revision history is tracked from that date forward, so it does not include changes made before then.
Check if KB5128496 is installed
This update is for Microsoft SQL Server 2017 for x64-based Systems, not a Windows component, so Get-HotFix does not list it. Compare the installed version of the product with the build Microsoft lists for this update.
Known issues, from Microsoft
Quoted from Microsoft's support article for KB5128496 (checked 2026-11-09). Microsoft lists 1 known issue. Verify against the article before acting.
Linked server queries that use MSDASQL fail with error 7416
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:
Msg 7416, Level 16
Access to the remote server is denied because no login-mapping exists.
A stricter connection validation check in the Database Engine can reject connections for certain linked server configurations that use the MSDASQL provider, even if earlier builds allowed those connections.
For more information and workarounds, see Linked server queries that use MSDASQL fail with error 7416 .
CVEs fixed by this update
Sorted exploited-first, then by CVSS. Every CVE links to its Senserva page with the full risk facts, references, and a ready-to-paste AI prompt.
| CVE | Severity | CVSS | EPSS | Exploited |
|---|---|---|---|---|
| CVE-2026-67625 | High | 8.5 | <1% | No |
| CVE-2026-68883 | High | 8.5 | <1% | No |
| CVE-2026-85886 | High | 8.5 | <1% | No |
| CVE-2026-85888 | High | 7.7 | <1% | No |
| CVE-2026-88081 | High | 7.7 | <1% | No |
| CVE-2026-32176 | Medium | 6.7 | <1% | No |
| CVE-2026-70189 | Medium | 6.7 | <1% | No |
| CVE-2026-88085 | Medium | 6.4 | <1% | No |
| CVE-2026-67628 | Medium | 4.9 | <1% | No |
Scope and sources
- Affected products
- Also released in October 2026
KB5126646
1097 CVEs · Critical · exploitedKB5126651
973 CVEs · Critical · exploitedKB5126653
1021 CVEs · Critical · exploitedKB5126655
1033 CVEs · Critical · exploitedKB5126657
954 CVEs · Critical · exploitedKB5126836
666 CVEs · Critical · exploitedKB5126868
785 CVEs · Critical · exploitedKB5127646
1055 CVEs · Critical · exploitedThe full month, summarized: Microsoft Patch Tuesday.
- Authoritative references
See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.