CVE-2026-20803

{"id": "CVE-2026-20803", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.2, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.2}]}, "published": "2026-01-13T18:16:06.630", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20803", "tags": ["Vendor Advisory"], "source": "secure@microsoft.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-306"}]}], "descriptions": [{"lang": "en", "value": "Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network."}], "lastModified": "2026-01-16T14:35:02.720", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:sql_server_2022:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "571B6885-6FD3-4E3F-A22A-583A0029F20A", "versionEndExcluding": "16.0.1165.1", "versionStartIncluding": "16.0.1000.6"}, {"criteria": "cpe:2.3:a:microsoft:sql_server_2022:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "B984CC39-AE9C-4F8E-B316-94EFF9462148", "versionEndExcluding": "16.0.4230.2", "versionStartIncluding": "16.0.4003.1"}, {"criteria": "cpe:2.3:a:microsoft:sql_server_2025:17.0.1000.7:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "E722BA1A-A8E8-486E-8D8E-6F9B7DD2B556"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}