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Fencer Intel
high 7.8

CVE-2021-33035 in the critical feed json

Buffer overflow from a crafted DBF file

published 5y ago modified 4mo ago also EUVD-2021-19755

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
50.6%
EPSS 50.6% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

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

Patch / fix

  • libreoffice Debian 14, Debian 13, Debian 12 1:4.3.1-1

debian advisories DEBIAN-CVE-2021-33035

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Exploit prediction

50.56% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

  • Apache Software Foundation Apache OpenOffice

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.