CVE-2026-88082: Microsoft SQL Server Elevation of Privilege Vulnerability
Heap-based buffer overflow in SQL Server allows an authorized attacker to elevate privileges locally.
Other sources
Microsoft SQL Server Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.4305.5Patch KB5126934 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.1210.3Patch KB5128493 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 17.0.5015.4Patch KB5126967 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.0.2200.2Patch KB5128495 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.0.4500.2Patch KB5128494 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 17.0.1145.4Patch KB5128492
Event History
Frequently Asked Questions
Who is realistically exposed to this vulnerability?
Systems running the listed Microsoft SQL Server 2019, SQL Server 2022, or SQL Server 2025 products are in scope. Exploitation is local, so exposure is primarily to users or processes that can authenticate locally and hold low-level privileges.
What level of access does an attacker need?
An attacker needs local access and low privileges. No user interaction is required, but the attack complexity is rated high.
What could successful exploitation allow?
Successful exploitation could allow elevation of privileges. The supplied metrics indicate high potential impact to confidentiality, integrity, and availability.