CVE-2026-63523

{"id": "CVE-2026-63523", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-63523", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-11T20:56:45.292414Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 2.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.8}]}, "affected": [{"source": "secure@microsoft.com", "affectedData": [{"vendor": "Microsoft", "product": "Skype for Business Server 2015 CU13", "versions": [{"status": "affected", "version": "9319.0", "lessThan": "6.0.9319.885", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Skype for Business Server 2019 CU8", "versions": [{"status": "affected", "version": "2046.0", "lessThan": "7.0.2046.569", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Skype for Business Server Subscription Edition CU1", "versions": [{"status": "affected", "version": "2046.0", "lessThan": "7.0.2046.879", "versionType": "custom"}], "platforms": ["x64-based Systems"]}]}], "published": "2026-09-08T19:18:07.267", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63523", "tags": ["Patch", "Vendor Advisory"], "source": "secure@microsoft.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker to perform spoofing over a network."}], "lastModified": "2026-09-16T19:21:56.487", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:skype_for_business_server:2015:cumulative_update_13:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "590D1547-C998-4BDD-BE06-379099E2D9C7"}, {"criteria": "cpe:2.3:a:microsoft:skype_for_business_server:2015:cumulative_update_13_hotfix_2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D7B2DE75-E220-447A-90F6-D077E611945B"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:skype_for_business_server:2019:cumulative_update_8:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "85821F4F-AC9B-4D9E-84A4-A57D842B0D5E"}, {"criteria": "cpe:2.3:a:microsoft:skype_for_business_server:2019:cumulative_update_8_hotfix1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8545EA2E-796F-4458-B996-5B907E7927EF"}, {"criteria": "cpe:2.3:a:microsoft:skype_for_business_server:2019:cumulative_update_8_hotfix2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "96E5BC34-2C62-4F15-AA4F-765F596C7445"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:skype_for_business_server_subscription_edition:7.0.2046.849:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "15BD78C6-A65A-4CD6-A91F-CA2876AD848C"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}