Summary
Impact: Security Feature Bypass. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What kind of security feature could be bypassed by successfully exploiting this vulnerability?
An attacker could bypass the logging of downloaded files.
Security updates
16.0.1200.5 — https://support.microsoft.com/help/5122771
17.0.1135.8 — https://support.microsoft.com/help/5122770
17.0.4085.5 — https://support.microsoft.com/help/5122769
16.0.4275.2 — https://support.microsoft.com/help/5122768
Vulnerabilities 1
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Medium 6.5
Microsoft SQL Server Security Feature Bypass Vulnerability
Insufficient logging in SQL Server allows an authorized attacker to bypass a security feature over a network.
Revision history
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#1
Information published.
References
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CVE-2026-66816 Microsoft SQL Server Security Feature Bypass Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66816
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss