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{"affected": [{"affectedData": [{"platforms": ["x64-based Systems"], "product": "Microsoft SQL Server 2022 (CU 26)", "vendor": "Microsoft", "versions": [{"lessThan": "16.0.4275.2", "status": "affected", "version": "16.0.0.0", "versionType": "custom"}]}, {"platforms": ["x64-based Systems"], "product": "Microsoft SQL Server 2022 (GDR)", "vendor": "Microsoft", "versions": [{"lessThan": "16.0.1200.5", "status": "affected", "version": "16.0.0", "versionType": "custom"}]}, {"platforms": ["x64-based Systems"], "product": "Microsoft SQL Server 2025 (CU8)", "vendor": "Microsoft", "versions": [{"lessThan": "17.0.4085.5", "status": "affected", "version": "17.0.0.0", "versionType": "custom"}]}, {"platforms": ["x64-based Systems"], "product": "Microsoft SQL Server 2025 for x64-based Systems (GDR)", "vendor": "Microsoft", "versions": [{"lessThan": "17.0.1135.8", "status": "affected", "version": "17.0.1050.2", "versionType": "custom"}]}], "source": "secure@microsoft.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient logging in SQL Server allows an authorized attacker to bypass a security feature over a network."}], "id": "CVE-2026-66816", "lastModified": "2026-09-08T18:38:46.007", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "secure@microsoft.com", "type": "Primary"}]}, "published": "2026-09-08T18:18:20.010", "references": [{"source": "secure@microsoft.com", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66816"}], "sourceIdentifier": "secure@microsoft.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-778"}], "source": "secure@microsoft.com", "type": "Primary"}]}

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