{"containers":{"cna":{"title":"Microsoft Exchange Server Remote Code Execution Vulnerability","datePublic":"2021-03-02T08:00:00.000Z","affected":[{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 19","cpes":["cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_19:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 8","cpes":["cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_8:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.02.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019","cpes":["cpe:2.3:a:microsoft:exchange_server:2019:*:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.02.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2013 Cumulative Update 22","cpes":["cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_22:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.00.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 2","cpes":["cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_2:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.02.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 13","cpes":["cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_13:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2013 Cumulative Update 23","cpes":["cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.00.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 3","cpes":["cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_3:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.02.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 14","cpes":["cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_14:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 4","cpes":["cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_4:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.02.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 15","cpes":["cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_15:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 5","cpes":["cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_5:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.02.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 6","cpes":["cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_6:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.02.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 16","cpes":["cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_16:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 17","cpes":["cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_17:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 7","cpes":["cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_7:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.02.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 18","cpes":["cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_18:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2013 Cumulative Update 21","cpes":["cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_21:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.00.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 12","cpes":["cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_12:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 8","cpes":["cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_8:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 1","cpes":["cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_1:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.02.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 9","cpes":["cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_9:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 10","cpes":["cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_10:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 11","cpes":["cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_11:*:*:*:*:*:*"],"platforms":["x64-based Systems"],"versions":[{"version":"15.01.0","lessThan":"publication","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":"2023-12-29T20:08:56.682Z"},"references":[{"tags":["x_refsource_MISC"],"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26855"},{"tags":["x_refsource_MISC"],"url":"http://packetstormsecurity.com/files/161846/Microsoft-Exchange-2019-SSRF-Arbitrary-File-Write.html"},{"tags":["x_refsource_MISC"],"url":"http://packetstormsecurity.com/files/161938/Microsoft-Exchange-ProxyLogon-Remote-Code-Execution.html"},{"tags":["x_refsource_MISC"],"url":"http://packetstormsecurity.com/files/162610/Microsoft-Exchange-2019-Unauthenticated-Email-Download.html"},{"tags":["x_refsource_MISC"],"url":"http://packetstormsecurity.com/files/162736/Microsoft-Exchange-ProxyLogon-Collector.html"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en-US","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","baseSeverity":"CRITICAL","baseScore":9.1,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:F/RL:O/RC:C"}}]},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-03T20:33:40.999Z"},"title":"CVE Program Container","references":[{"tags":["x_refsource_MISC","x_transferred"],"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26855"},{"tags":["x_refsource_MISC","x_transferred"],"url":"http://packetstormsecurity.com/files/161846/Microsoft-Exchange-2019-SSRF-Arbitrary-File-Write.html"},{"tags":["x_refsource_MISC","x_transferred"],"url":"http://packetstormsecurity.com/files/161938/Microsoft-Exchange-ProxyLogon-Remote-Code-Execution.html"},{"tags":["x_refsource_MISC","x_transferred"],"url":"http://packetstormsecurity.com/files/162610/Microsoft-Exchange-2019-Unauthenticated-Email-Download.html"},{"tags":["x_refsource_MISC","x_transferred"],"url":"http://packetstormsecurity.com/files/162736/Microsoft-Exchange-ProxyLogon-Collector.html"}]},{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-26855","role":"CISA Coordinator","options":[{"Exploitation":"active"},{"Automatable":"yes"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2024-01-02T18:10:15.970217Z"}}},{"other":{"type":"kev","content":{"dateAdded":"2021-11-03","reference":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26855"}}}],"references":[{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26855","tags":["government-resource"]}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-918","description":"CWE-918 Server-Side Request Forgery (SSRF)"}]}],"timeline":[{"time":"2021-11-03T00:00:00.000Z","lang":"en","value":"CVE-2021-26855 added to CISA KEV"}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-10-21T23:25:53.200Z"}}]},"cveMetadata":{"assignerOrgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","assignerShortName":"microsoft","cveId":"CVE-2021-26855","datePublished":"2021-03-02T23:55:26.000Z","dateReserved":"2021-02-08T00:00:00.000Z","dateUpdated":"2025-10-21T23:25:53.200Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"}