{"containers": {"cna": {"title": "Skype for Business and Lync Spoofing Vulnerability", "datePublic": "2021-05-11T07:00:00.000Z", "affected": [{"vendor": "Microsoft", "product": "Skype for Business Server 2015 CU11", "cpes": ["cpe:2.3:a:microsoft:skype_for_business_server:2015:cumulative_update_11:*:*:*:*:*:*"], "platforms": ["Unknown"], "versions": [{"version": "2015 CU11", "lessThan": "2046.369", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Lync Server 2013 CU10", "cpes": ["cpe:2.3:a:microsoft:lync_server:2013:cumulative_update_10:*:*:*:*:*:*"], "platforms": ["Unknown"], "versions": [{"version": "8308.0", "lessThan": "8308.1144", "versionType": "custom", "status": "affected"}]}], "descriptions": [{"value": "Skype for Business and Lync Spoofing Vulnerability", "lang": "en-US"}], "problemTypes": [{"descriptions": [{"description": "Spoofing", "lang": "en-US", "type": "Impact"}]}], "providerMetadata": {"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2023-12-28T23:57:07.935Z"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26421"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en-US", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "baseSeverity": "MEDIUM", "baseScore": 6.5, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:C"}}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T20:26:25.289Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26421"}]}]}, "cveMetadata": {"assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "assignerShortName": "microsoft", "cveId": "CVE-2021-26421", "datePublished": "2021-05-11T19:11:12.000Z", "dateReserved": "2021-01-29T00:00:00.000Z", "dateUpdated": "2024-08-03T20:26:25.289Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:microsoft:skype_for_business_server:2015:cumulative_update_11:*:*:*:*:*:*"], "platforms": ["Unknown"], "product": "Skype for Business Server 2015 CU11", "vendor": "Microsoft", "versions": [{"lessThan": "2046.369", "status": "affected", "version": "2015 CU11", "versionType": "custom"}]}, {"cpes": ["cpe:2.3:a:microsoft:lync_server:2013:cumulative_update_10:*:*:*:*:*:*"], "platforms": ["Unknown"], "product": "Microsoft Lync Server 2013 CU10", "vendor": "Microsoft", "versions": [{"lessThan": "8308.1144", "status": "affected", "version": "8308.0", "versionType": "custom"}]}], "source": "secure@microsoft.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"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", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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"}], "id": "CVE-2021-26421", "lastModified": "2026-06-17T03:43:22.813", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.3, "impactScore": 4.7, "source": "secure@microsoft.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.2, "source": "nvd@nist.gov", "type": "Secondary"}]}, "published": "2021-05-11T19:15:08.870", "references": [{"source": "secure@microsoft.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26421"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26421"}], "sourceIdentifier": "secure@microsoft.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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