CVE-2026-66814
HIGHCVSS 8.8/10EPSS 0.43%
Last modified
CVE-2026-66814 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Insufficient granularity of access control in SQL Server allows an authorized attacker to elevate privileges over a network.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.
Description
Insufficient granularity of access control in SQL Server allows an authorized attacker to elevate privileges over a network.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Sql Server 2017 | < 14.0.2130.4 |
| Microsoft | Sql Server 2017 | >= 14.0.3006.16, < 14.0.3550.4 |
| Microsoft | Sql Server 2019 | < 15.0.2190.7 |
| Microsoft | Sql Server 2019 | >= 15.0.4003.23, < 15.0.4490.9 |
| Microsoft | Sql Server 2022 | < 16.0.1200.5 |
| Microsoft | Sql Server 2022 | >= 16.0.4003.1, < 16.0.4275.2 |
| Microsoft | Sql Server 2025 | < 17.0.1135.8 |
| Microsoft | Sql Server 2025 | >= 17.0.4006.2, < 17.0.4085.5 |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66814Vendor Advisory, Patch
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-66814?
Insufficient granularity of access control in SQL Server allows an authorized attacker to elevate privileges over a network.
How severe is CVE-2026-66814?
CVE-2026-66814 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.
How do I fix CVE-2026-66814?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2026-66814?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST