{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42897", "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "state": "PUBLISHED", "assignerShortName": "microsoft", "dateReserved": "2026-04-30T22:35:54.967Z", "datePublished": "2026-05-14T17:00:36.515Z", "dateUpdated": "2026-05-14T18:09:08.749Z"}, "containers": {"cna": {"title": "Microsoft Exchange Server Spoofing Vulnerability", "datePublic": "2026-05-14T14:00:00.000Z", "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:exchange_server_2016:*:cumulative_update_23:*:*:*:*:*:*", "versionStartIncluding": "-"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:exchange_server_2019:*:cumulative_update_14:*:*:*:*:*:*", "versionStartIncluding": "-"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:exchange_server_2019:*:cumulative_update_15:*:*:*:*:*:*", "versionStartIncluding": "-"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:exchange_server_se:*:RTM:*:*:*:*:*:*", "versionStartIncluding": "-"}]}]}], "affected": [{"vendor": "Microsoft", "product": "Microsoft Exchange Server 2016 Cumulative Update 23", "platforms": ["x64-based Systems"], "versions": [{"version": "-", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Exchange Server 2019 Cumulative Update 14", "platforms": ["x64-based Systems"], "versions": [{"version": "-", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Exchange Server 2019 Cumulative Update 15", "platforms": ["x64-based Systems"], "versions": [{"version": "-", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Exchange Server Subscription Edition RTM", "platforms": ["x64-based Systems"], "versions": [{"version": "-", "status": "affected"}]}], "descriptions": [{"value": "Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.", "lang": "en-US"}], "problemTypes": [{"descriptions": [{"description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "lang": "en-US", "type": "CWE", "cweId": "CWE-79"}]}], "providerMetadata": {"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2026-05-14T18:09:08.749Z"}, "references": [{"name": "Microsoft Exchange Server Spoofing Vulnerability", "tags": ["vendor-advisory", "patch"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42897"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en-US", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "baseSeverity": "HIGH", "baseScore": 8.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:F/RL:O/RC:C"}}]}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network."}], "id": "CVE-2026-42897", "lastModified": "2026-05-14T18:19:50.767", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "secure@microsoft.com", "type": "Primary"}]}, "published": "2026-05-14T18:16:49.360", "references": [{"source": "secure@microsoft.com", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42897"}], "sourceIdentifier": "secure@microsoft.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "secure@microsoft.com", "type": "Primary"}]}

{}

{"created": "2026-05-14T18:30:26.578079+00:00", "updated": "2026-05-14T18:30:26.578090+00:00", "vendors": []}