CVE-2021-20839

MediumCVSS 6.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-611

Affected software

Vendor	Product	Versions
Antenna House, Inc.	Office Server Document Converter	V7.2MR4 and earlier and V7.1MR7 and earlier

References

https://jvn.jp/en/jp/JVN33453839/index.htmlThird Party Advisory
https://www.antenna.co.jp/news/2021/osdc72-20211027.htmlPatch, Vendor Advisory
https://jvn.jp/en/jp/JVN33453839/index.htmlThird Party Advisory
https://www.antenna.co.jp/news/2021/osdc72-20211027.htmlPatch, Vendor Advisory

Timeline

Published: Nov 1, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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