CVE-2026-96956Important
SQL Server Elevation of Privilege Vulnerability
Assessment
Stack-based buffer overflow in SQL Server allows an authorized attacker to elevate privileges over a network.
- Severity
- Important
- CVSS base score
- 8.0CVSS:3.1/
AV:N/ AC:H/ PR:H/ UI:N/ S:C/ C:H/ I:H/ A:H/ E:U/ RL:O/ RC:C - Impact
- Elevation of Privilege
- EPSS, next 30 days
- Not scored yet
- Public exploit code
- No Nuclei template lists it
- Exploitability
- Exploitation Less Likely
- Publicly disclosed
- No
- Customer action
- Required: apply the update
- Component
- SQL Server
- Weakness
- CWE-121: Stack-based Buffer Overflow
- Issued by
- Microsoft
- Published
- 13 Oct 2026 · October 2026
- Last revised
- 13 Oct 2026
Updates that fix it
8 KBs| KB | Type | Restart | Applies to | Other CVEs |
|---|---|---|---|---|
| KB5126934 | Security Update | Required | Microsoft SQL Server 2022 for x64-based Systems (CU27) | All CVEs in KB5126934 |
| KB5126967 | Security Update | Required | Microsoft SQL Server 2025 for x64-based Systems (CU9) | All CVEs in KB5126967 |
| KB5128492 | Security Update | Required | Microsoft SQL Server 2025 for x64-based Systems (GDR) | All CVEs in KB5128492 |
| KB5128493 | Security Update | Required | Microsoft SQL Server 2022 for x64-based Systems (GDR) | All CVEs in KB5128493 |
| KB5128494 | Security Update | Required | Microsoft SQL Server 2019 for x64-based Systems (CU32) | All CVEs in KB5128494 |
| KB5128495 | Security Update | Required | Microsoft SQL Server 2019 for x64-based Systems (GDR) | All CVEs in KB5128495 |
| KB5128496 | Security Update | Required | Microsoft SQL Server 2017 for x64-based Systems (CU31) | All CVEs in KB5128496 |
| KB5128497 | Security Update | Required | Microsoft SQL Server 2017 for x64-based Systems (GDR) | All CVEs in KB5128497 |
What changed
First observed 14 Oct 2026No field changes in the recorded history.
Cite this recorded revision to keep the same title, summary, facts and links when the page changes.
A day selects the latest observation by the end of that UTC day; today's selection can change until midnight. History starts when this installation records it.