CVE-2021-20839
6.5 · MEDIUMOverview
CVE-2021-20839 is a medium-severity vulnerability affecting antennahouse office_server_document_converter. It was published on November 1, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from antennahouse. Update office_server_document_converter to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| antennahouse | office_server_document_converter | >= 0, < 5.2 | Affected |
Frequently Asked Questions
What is CVE-2021-20839?
CVE-2021-20839 is a medium-severity vulnerability affecting antennahouse office_server_document_converter. It was published on November 1, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
How severe is CVE-2021-20839?
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-20839?
Check the references section for vendor advisories and patches from antennahouse. Update office_server_document_converter to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-20839?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-20839 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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