---
title: "CVE-2021-33035: Buffer overflow from a crafted DBF file | CubePath"
description: "Apache OpenOffice opens dBase/DBF documents and shows the contents as spreadsheets. DBF are database files with data organized in fields. When reading…"
language: en
source: https://cubepath.com/security/cve/CVE-2021-33035
---

# CVE-2021-33035: Buffer overflow from a crafted DBF file | CubePath

## Description

Apache OpenOffice opens dBase/DBF documents and shows the contents as spreadsheets. DBF are database files with data organized in fields. When reading DBF data the size of certain fields is not checked: the data is just copied into local variables. A carefully crafted document could overflow the allocated space, leading to the execution of arbitrary code by altering the contents of the program stack. This issue affects Apache OpenOffice up to and including version 4.1.10

Official description from the CVE record, published by apache. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2021-33035)

## Key data

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.50563 (50.6% probability)

Percentile

98.9%

Scores of

Nov 10, 2026

Model

v2026.06.15

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-120](https://cwe.mitre.org/data/definitions/120.html) Buffer Copy without Checking Size of Input

## Affected products

Products listed in the CVE record, as the CNA published them.

- Apache OpenOffice

  - affected: Apache OpenOffice up to 4.1.10
  - affected: OpenOffice.org up to 3.4

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [github.com/apache/openoffice/commit/efddaef0151af3be16078cc…](https://github.com/apache/openoffice/commit/efddaef0151af3be16078cc4d88c6bae0f911e56#diff-ea66e734dd358922aba12ad4ba39c96bdc6cbde587d07dbc63d04daa0a30e90f)
- [\[announce\] 20211007 CVE-2021-33035: Apache OpenOffice: Buffer overflow from a crafted DBF file](https://lists.apache.org/thread.html/r929c0c6a53cad64a1007b878342756badbb05ddd9b8f31a6d0b424cb%40%3Cannounce.apache.org%3E)  (lists.apache.org) mailing-list
- [\[openoffice-users\] 20211007 CVE-2021-33035: Apache OpenOffice: Buffer overflow from a crafted DBF file](https://lists.apache.org/thread.html/r1ab8532e11f41bc7ca057ac7e39cab25f2e1f9d5f4929788ae21c8b9%40%3Cusers.openoffice.apache.org%3E)  (lists.apache.org) mailing-list
- [\[oss-security\] 20211007 CVE-2021-33035: Apache OpenOffice: Buffer overflow from a crafted DBF file](http://www.openwall.com/lists/oss-security/2021/10/07/3)  (openwall.com) mailing-list

## Timeline

1. ID reserved May 15, 2021
2. Record published Sep 23, 2021
3. Record last updated Aug 3, 2024

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## About CubePath

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:03 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)