XML external entity injection in Antenna House Office Server Document Converter
Priority LOW 36CWE-611Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-611 and the CVSS impact.
Summary
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 by processing a specially crafted XML document.
Why it matters now
EPSS 0.0152 74th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Antenna House | Office Server Document Converter | V7.2MR4 and earlier and V7.1MR7 and earlier | — | No fix listed | CNA |
- Office Server Document Converter VendorAntenna House Affected V7.2MR4 and earlier and V7.1MR7 and earlier Fixed in — No fix listed CNA
CPE configurations NVD · 23
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:antennahouse:office_server_document_converter:*:*:*:*:*:*:*:* | before 5.2 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:5.2:-:*:*:*:*:*:* | 5.2 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:6.0:-:*:*:*:*:*:* | 6.0 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr1:*:*:*:*:*:* | 6.0 mr1 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr2:*:*:*:*:*:* | 6.0 mr2 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:6.1:-:*:*:*:*:*:* | 6.1 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr2:*:*:*:*:*:* | 6.1 mr2 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr2:*:*:pro:*:*:* | 6.1 mr2 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr3:*:*:*:*:*:* | 6.1 mr3 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr4:*:*:*:*:*:* | 6.1 mr4 | Vulnerable | Antenna House |
- cpe:2.3:a:antennahouse:office_server_document_converter:*:*:*:*:*:*:*:* Versions before 5.2 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:5.2:-:*:*:*:*:*:* Versions 5.2 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:6.0:-:*:*:*:*:*:* Versions 6.0 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr1:*:*:*:*:*:* Versions 6.0 mr1 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr2:*:*:*:*:*:* Versions 6.0 mr2 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:6.1:-:*:*:*:*:*:* Versions 6.1 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr2:*:*:*:*:*:* Versions 6.1 mr2 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr2:*:*:pro:*:*:* Versions 6.1 mr2 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr3:*:*:*:*:*:* Versions 6.1 mr3 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr4:*:*:*:*:*:* Versions 6.1 mr4 Vulnerable ·Antenna House
Show 13 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:antennahouse:office_server_document_converter:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr1:*:*:*:*:*:* | 7.0 mr1 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr2:*:*:*:*:*:* | 7.0 mr2 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr3:*:*:*:*:*:* | 7.0 mr3 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:7.1:-:*:*:*:*:*:* | 7.1 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr1:*:*:*:*:*:* | 7.1 mr1 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr2:*:*:*:*:*:* | 7.1 mr2 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr3:*:*:*:*:*:* | 7.1 mr3 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:7.2:*:*:*:*:*:*:* | 7.2 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr1:*:*:*:*:*:* | 7.2 mr1 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr2:*:*:*:*:*:* | 7.2 mr2 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr3:*:*:*:*:*:* | 7.2 mr3 | Vulnerable | Antenna House |
| cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr4:*:*:*:*:*:* | 7.2 mr4 | Vulnerable | Antenna House |
- cpe:2.3:a:antennahouse:office_server_document_converter:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr1:*:*:*:*:*:* Versions 7.0 mr1 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr2:*:*:*:*:*:* Versions 7.0 mr2 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr3:*:*:*:*:*:* Versions 7.0 mr3 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:7.1:-:*:*:*:*:*:* Versions 7.1 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr1:*:*:*:*:*:* Versions 7.1 mr1 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr2:*:*:*:*:*:* Versions 7.1 mr2 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr3:*:*:*:*:*:* Versions 7.1 mr3 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:7.2:*:*:*:*:*:*:* Versions 7.2 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr1:*:*:*:*:*:* Versions 7.2 mr1 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr2:*:*:*:*:*:* Versions 7.2 mr2 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr3:*:*:*:*:*:* Versions 7.2 mr3 Vulnerable ·Antenna House
- cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr4:*:*:*:*:*:* Versions 7.2 mr4 Vulnerable ·Antenna House
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20838
- 2026-10-03 Alias added: GHSA-q423-xqrx-xqpf
References
More Antenna House Office Server Document Converter vulnerabilities
- TI-2018-02900 Out-of-bounds write in Antenna House CVSS 3.0HIGH 8.8
- TI-2018-02904 Out-of-bounds write in Antenna House CVSS 3.0HIGH 8.8
- TI-2018-02901 Out-of-bounds write in Antenna House CVSS 3.0HIGH 8.8
- TI-2018-02899 Out-of-bounds write in Antenna House CVSS 3.1HIGH 7.8
- TI-2018-02897 Out-of-bounds write in Antenna House CVSS 3.1HIGH 7.8
- TI-2018-02898 Out-of-bounds write in Antenna House CVSS 3.1HIGH 7.8
Sources
- CVE-2021-20838 · CVE Program
- CVE-2021-20838 · NVD
- FIRST EPSS
- GHSA-q423-xqrx-xqpf · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences