CVE-2026-66816
MEDIUMCVSS 6.5/10EPSS 0.71%
Last modified
CVE-2026-66816 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Insufficient logging in SQL Server allows an authorized attacker to bypass a security feature over a network.. EPSS estimates a 0.71% chance of exploitation in the next 30 days.
Description
Insufficient logging in SQL Server allows an authorized attacker to bypass a security feature over a network.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| 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-2026-66816Vendor Advisory, Patch
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-66816?
Insufficient logging in SQL Server allows an authorized attacker to bypass a security feature over a network.
How severe is CVE-2026-66816?
CVE-2026-66816 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.71% probability of exploitation in the next 30 days.
How do I fix CVE-2026-66816?
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.
Related CVEs from 2026
- CVE-2026-66807Stack-based buffer overflow in Microsoft Office allows an un…7.8
- CVE-2026-66808Deserialization of untrusted data in Microsoft Office ShareP…8.8
- CVE-2026-66809Out-of-bounds read in Microsoft Office allows an unauthorize…5.5
- CVE-2026-6681The PKCS#7 decode path ignores the caller-supplied output bu…5.3
- CVE-2026-66810Heap-based buffer overflow in Microsoft Office Word allows a…5.5
- CVE-2026-66814Insufficient granularity of access control in SQL Server all…8.8
- CVE-2026-66818Improper privilege management in SQL Server allows an author…8.8
- CVE-2026-66819Improper neutralization of special elements used in an sql c…8.8
- CVE-2026-6682In FatFS R0.16 and earlier contains a FAT32 integer overflow…7.6
- CVE-2026-66820Improper neutralization of special elements used in an sql c…8.8
- CVE-2026-66824A stored cross-site scripting vulnerability existed in the c…9.2
- CVE-2026-66825Pivotick contains a cross-site scripting vulnerability in th…6.9
Are you affected by CVE-2026-66816?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST