CVE-2026-54117CriticalRevised 20 Aug
Microsoft SQL Server Remote Code Execution Vulnerability
Assessment
Deserialization of untrusted data in SQL Server allows an unauthorized attacker to execute code over a network.
- Severity
- Critical
- CVSS base score
- 9.8CVSS:3.1/
AV:N/ AC:L/ PR:N/ UI:N/ S:U/ C:H/ I:H/ A:H/ E:U/ RL:O/ RC:C - Impact
- Remote Code Execution
- EPSS, next 30 days
- 1.5%Higher than 73.8% of scored CVEs · FIRST model run 26 Sep 2026 · about EPSS
- Exploitability
- Exploitation Less Likely
- Publicly disclosed
- No
- Customer action
- Required: apply the update
- Component
- SQL Server
- Weakness
- CWE-502: Deserialization of Untrusted Data
- Issued by
- Microsoft
- Published
- 14 Jul 2026 · July 2026
- Last revised
- 20 Aug 2026The CVSS vector string was update to reflect that an attacker does not require any privileges to successfully exploit this vulnerability (PR:N). This is an informational change only.
Updates that fix it
2 KBs| KB | Type | Restart | Applies to | Other CVEs |
|---|---|---|---|---|
| KB5101346 | Security Update | — | Microsoft SQL Server 2025 for x64-based Systems (CU6) | All CVEs in KB5101346 |
| KB5102333 | Security Update | — | Microsoft SQL Server 2025 for x64-based Systems (GDR) | All CVEs in KB5102333 |
Affected products
SQL Server2 affected products
- Microsoft SQL Server 2025 for x64-based Systems (CU6)
- Microsoft SQL Server 2025 for x64-based Systems (GDR)