{"id":"CVE-2021-20839","aliases":["EUVD-2021-8251","GHSA-gcx3-8mj9-xgm6"],"status":"published","title":"Office Server Document Converter V7.2MR4 and earlier and V7.1MR7 and earlier allows a remote...","description":"Office Server Document Converter V7.2MR4 and earlier and V7.1MR7 and earlier allows a remote unauthenticated attacker to conduct an XML External Entity (XXE) attack to cause a denial of service (DoS) condition to the other servers by processing a specially crafted XML document.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01138,"percentile":0.66856,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-611"],"published":"2021-11-01T01:50:16Z","modified":"2026-06-17T03:34:31Z","products":[{"vendor":"antenna house, inc.","product":"office server document converter"},{"vendor":"antennahouse","product":"office_server_document_converter"}],"references":[{"url":"https://www.antenna.co.jp/news/2021/osdc72-20211027.html","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://jvn.jp/en/jp/JVN33453839/index.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20839"},{"url":"https://github.com/advisories/GHSA-gcx3-8mj9-xgm6"}],"sources":{"cve":[{"id":"CVE-2021-20839","description":"Office Server Document Converter V7.2MR4 and earlier and V7.1MR7 and earlier allows a remote unauthenticated attacker to conduct an XML External Entity (XXE) attack to cause a denial of service (DoS) condition to the other servers by processing a specially crafted XML document.","status":"published","published":"2021-11-01T01:50:16Z","modified":"2024-08-03T17:53:22.634Z","updated_at":"2026-11-02T14:32:55.905855Z"}],"euvd":[{"id":"EUVD-2021-8251","description":"Office Server Document Converter V7.2MR4 and earlier and V7.1MR7 and earlier allows a remote unauthenticated attacker to conduct an XML External Entity (XXE) attack to cause a denial of service (DoS) condition to the other servers by processing a specially crafted XML document.","status":"published","published":"2021-11-01T01:50:16Z","modified":"2024-08-03T17:53:22Z","updated_at":"2026-11-03T03:25:07.874589Z"}],"ghsa":[{"id":"GHSA-gcx3-8mj9-xgm6","title":"Office Server Document Converter V7.2MR4 and earlier and V7.1MR7 and earlier allows a remote...","description":"Office Server Document Converter V7.2MR4 and earlier and V7.1MR7 and earlier allows a remote unauthenticated attacker to conduct an XML External Entity (XXE) attack to cause a denial of service (DoS) condition to the other servers by processing a specially crafted XML document.","status":"published","published":"2022-05-24T19:19:22Z","modified":"2023-01-30T05:03:32Z","cwes":["CWE-611"],"updated_at":"2026-11-02T14:46:51.429276Z"}],"nvd":[{"id":"CVE-2021-20839","description":"Office Server Document Converter V7.2MR4 and earlier and V7.1MR7 and earlier allows a remote unauthenticated attacker to conduct an XML External Entity (XXE) attack to cause a denial of service (DoS) condition to the other servers by processing a specially crafted XML document.","status":"published","published":"2021-11-01T02:15:06.923Z","modified":"2026-06-17T03:34:31.323Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-611"],"updated_at":"2026-11-02T14:07:00.549994Z"}]}}