CVE-2026-54118 Microsoft SQL Server Remote Code Execution Vulnerability
An unauthorized attacker can execute arbitrary code remotely via deserialization of untrusted data in Microsoft SQL Server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-54118?
CVE-2026-54118 is a critical unsafe deserialization vulnerability in Microsoft Sql Server 2016, published on 14 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Deserialization of untrusted data in SQL Server allows an unauthorized attacker to execute code over a network.
Weakness: CWE-502
Which versions are affected by CVE-2026-54118?
It affects 5 products.
Products include Microsoft Sql Server 2016, Microsoft Sql Server 2017, Microsoft Sql Server 2019, Microsoft Sql Server 2022, Microsoft Sql Server 2025.
How do I fix CVE-2026-54118?
No fix has been published for CVE-2026-54118 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-54118 being exploited?
There is no known exploitation of CVE-2026-54118 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Sql Server 2016
- CVE-2026-54117 Microsoft SQL Server Remote Code Execution Vulnerability
- CVE-2026-47295 Microsoft SQL Server Elevation of Privilege Vulnerability
- CVE-2026-55002 Microsoft SQL Server Elevation of Privilege Vulnerability
- CVE-2026-40370 SQL Server Remote Code Execution Vulnerability
- CVE-2026-33120 Microsoft SQL Server Remote Code Execution Vulnerability
Sources
Also known as GHSA-c2qv-v7mm-7vwh.