{ "containers": { "cna": { "title": "Microsoft Exchange Server Remote Code Execution Vulnerability", "datePublic": "2021-11-09T08:00:00.000Z", "affected": [ { "vendor": "Microsoft", "product": "Microsoft Exchange Server 2016 Cumulative Update 21", "cpes": [ "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:*" ], "platforms": [ "x64-based Systems" ], "versions": [ { "version": "15.01.0", "lessThan": "15.01.2308.020", "versionType": "custom", "status": "affected" } ] }, { "vendor": "Microsoft", "product": "Microsoft Exchange Server 2019 Cumulative Update 10", "cpes": [ "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_10:*:*:*:*:*:*" ], "platforms": [ "x64-based Systems" ], "versions": [ { "version": "15.02.0", "lessThan": "15.02.0792.019", "versionType": "custom", "status": "affected" } ] }, { "vendor": "Microsoft", "product": "Microsoft Exchange Server 2016 Cumulative Update 22", "cpes": [ "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_22:*:*:*:*:*:*" ], "platforms": [ "x64-based Systems" ], "versions": [ { "version": "15.0.0", "lessThan": "15.01.2375.017", "versionType": "custom", "status": "affected" } ] }, { "vendor": "Microsoft", "product": "Microsoft Exchange Server 2019 Cumulative Update 11", "cpes": [ "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_11:*:*:*:*:*:*" ], "platforms": [ "x64-based Systems" ], "versions": [ { "version": "15.02.0", "lessThan": "15.02.0986.014", "versionType": "custom", "status": "affected" } ] } ], "descriptions": [ { "value": "Microsoft Exchange Server Remote Code Execution Vulnerability", "lang": "en-US" } ], "problemTypes": [ { "descriptions": [ { "description": "Remote Code Execution", "lang": "en-US", "type": "Impact" } ] } ], "providerMetadata": { "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2024-05-29T14:47:48.107Z" }, "references": [ { "tags": [ "x_refsource_MISC" ], "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42321" }, { "tags": [ "x_refsource_MISC" ], "url": "http://packetstormsecurity.com/files/166153/Microsoft-Exchange-Server-Remote-Code-Execution.html" }, { "tags": [ "x_refsource_MISC" ], "url": "http://packetstormsecurity.com/files/168131/Microsoft-Exchange-Server-ChainedSerializationBinder-Remote-Code-Execution.html" } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en-US", "value": "GENERAL" } ], "cvssV3_1": { "version": "3.1", "baseSeverity": "HIGH", "baseScore": 8.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C" } } ] }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T03:30:38.363Z" }, "title": "CVE Program Container", "references": [ { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42321" }, { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "http://packetstormsecurity.com/files/166153/Microsoft-Exchange-Server-Remote-Code-Execution.html" }, { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "http://packetstormsecurity.com/files/168131/Microsoft-Exchange-Server-ChainedSerializationBinder-Remote-Code-Execution.html" } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2021-42321", "role": "CISA Coordinator", "options": [ { "Exploitation": "active" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2024-01-03T16:43:32.753195Z" } } }, { "other": { "type": "kev", "content": { "dateAdded": "2021-11-17", "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42321" } } } ], "references": [ { "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42321", "tags": [ "government-resource" ] } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "description": "CWE-noinfo Not enough information" } ] } ], "timeline": [ { "time": "2021-11-17T00:00:00.000Z", "lang": "en", "value": "CVE-2021-42321 added to CISA KEV" } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-21T23:25:25.274Z" } } ] }, "cveMetadata": { "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "assignerShortName": "microsoft", "cveId": "CVE-2021-42321", "datePublished": "2021-11-10T00:47:43.000Z", "dateReserved": "2021-10-12T00:00:00.000Z", "dateUpdated": "2025-10-21T23:25:25.274Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1" }