CVE-2026-68883

Microsoft SQL Server Elevation of Privilege Vulnerability

CVE-2026-68883 is fixed in 8 products on 1 platform, first by KB5128496, released October 13, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

8.5

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0056

46th percentile

<p>Heap-based buffer overflow in SQL Server allows an authorized attacker to elevate privileges over a network.</p>

Where it's fixed

Product	Fix	Released
Microsoft
Microsoft SQL Server 2017 for x64-based Systems (CU31)	KB5128496	Oct 13, 2026
Microsoft SQL Server 2017 for x64-based Systems (GDR)	KB5128497	Oct 13, 2026
Microsoft SQL Server 2019 for x64-based Systems (CU32)	KB5128494	Oct 13, 2026
Microsoft SQL Server 2019 for x64-based Systems (GDR)	KB5128495	Oct 13, 2026
Microsoft SQL Server 2022 for x64-based Systems (CU27)	KB5126934	Oct 13, 2026
Microsoft SQL Server 2022 for x64-based Systems (GDR)	KB5128493	Oct 13, 2026
Microsoft SQL Server 2025 for x64-based Systems (CU9)	KB5126967	Oct 13, 2026
Microsoft SQL Server 2025 for x64-based Systems (GDR)	KB5128492	Oct 13, 2026

Details

Published
October 13, 2026
Weakness
Heap-based Buffer Overflow
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68883

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