CVE-2026-77484: Microsoft SQL Server Remote Code Execution Vulnerability
Deserialization of untrusted data in SQL Server allows an authorized attacker to execute code over a network.
Other sources
Microsoft SQL Server Remote Code Execution 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 16.0.4275.2Patch KB5122768 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.1200.5Patch KB5122771 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 17.0.4085.5Patch KB5122769 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.0.4490.9Patch KB5122772 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 17.0.1135.8Patch KB5122770 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.0.2190.7Patch KB5122773
Event History
Frequently Asked Questions
What level of access does an attacker need to exploit this issue?
The attacker must be authorized, meaning they need privileges to access the affected SQL Server. Exploitation can be performed over the network and does not require user interaction.
Which SQL Server releases are identified as affected?
The affected software list includes Microsoft SQL Server 2019, SQL Server 2022, and SQL Server 2025, including SQL Server 2019 CU 32, SQL Server 2022 CU 26, and SQL Server 2025 CU8.
What could successful exploitation allow?
Successful exploitation allows code execution on the affected SQL Server. The supplied severity data indicates high impacts to confidentiality, integrity, and availability.