{ "id": "CVE-2021-26421", "sourceIdentifier": "secure@microsoft.com", "published": "2021-05-11T19:15:08.870", "lastModified": "2023-08-02T00:15:11.110", "vulnStatus": "Modified", "descriptions": [ { "lang": "en", "value": "Skype for Business and Lync Spoofing Vulnerability" }, { "lang": "es", "value": "Una vulnerabilidad de Suplantaci\u00f3n de Identidad de Skype Business y Lync" } ], "metrics": { "cvssMetricV31": [ { "source": "secure@microsoft.com", "type": "Primary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM" }, "exploitabilityScore": 1.3, "impactScore": 4.7 }, { "source": "nvd@nist.gov", "type": "Secondary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseScore": 7.1, "baseSeverity": "HIGH" }, "exploitabilityScore": 2.8, "impactScore": 4.2 } ], "cvssMetricV2": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "2.0", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N", "accessVector": "NETWORK", "accessComplexity": "MEDIUM", "authentication": "NONE", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "availabilityImpact": "NONE", "baseScore": 5.8 }, "baseSeverity": "MEDIUM", "exploitabilityScore": 8.6, "impactScore": 4.9, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true } ] }, "weaknesses": [ { "source": "nvd@nist.gov", "type": "Primary", "description": [ { "lang": "en", "value": "NVD-CWE-noinfo" } ] } ], "configurations": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:microsoft:lync_server:2013:cumulative_update_10:*:*:*:*:*:*", "matchCriteriaId": "33F380C0-651D-4ACF-B729-8A05EC5D5AA4" }, { "vulnerable": true, "criteria": "cpe:2.3:a:microsoft:skype_for_business_server:2015:cumulative_update_11:*:*:*:*:*:*", "matchCriteriaId": "E5E44D3D-AED8-4A45-8A48-3F21A7CE4D26" } ] } ] } ], "references": [ { "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26421", "source": "secure@microsoft.com", "tags": [ "Patch", "Vendor Advisory" ] } ] }