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TI-2021-17491 Aliases CVE-2021-40439GHSA-7579-q6rq-wf6r

Billion Laughs

Priority LOW 35CWE-611Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
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

Apache OpenOffice has a dependency on expat software. Versions prior to 2.1.0 were subject to CVE-2013-0340 a "Billion Laughs" entity expansion denial of service attack and exploit via crafted XML files. ODF files consist of a set of XML files. All versions of Apache OpenOffice up to 4.1.10 are subject to this issue. expat in version 4.1.11 is patched.

Why it matters now

EPSS 0.03866 90th 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

VendorProductAffected versionsFixed inStatusSource
ApacheApache OpenOfficeApache OpenOffice – 4.1.10; OpenOffice.org – 3.4—No fix listedCNA
  • Apache OpenOffice VendorApache Affected Apache OpenOffice – 4.1.10; OpenOffice.org – 3.4 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:openoffice:*:*:*:*:*:*:*:*up to 4.1.10VulnerableApache
  • cpe:2.3:a:apache:openoffice:*:*:*:*:*:*:*:* Versions up to 4.1.10 Vulnerable ·Apache

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-40439
  2. 2026-10-03 Alias added: GHSA-7579-q6rq-wf6r
  3. 2026-10-14 EPSS moved to the 90th–95th percentile

References

Advisory 2

Other 1

  • TI-2018-07474 An information disclosure vulnerability occurs when LibreOffice 6.0.3 and Apache… CVSS 3.0HIGH 7.5
  • TI-2021-12639 Buffer overflow from a crafted DBF file CVSS 3.1HIGH 7.8
  • TI-2014-02850 Apache OpenOffice before 4.1.1 allows remote attackers to execute arbitrary commands and… CVSS 2.0HIGH 9.3
  • TI-2009-02810 Heap-based buffer overflow in the GIFLZWDecompressor::GIFLZWDecompressor function in… CVSS 2.0HIGH 9.3
  • TI-2009-02809 Integer overflow in the XPMReader::ReadXPM function in filter.vcl/ixpm/svt_xpmread.cxx in… CVSS 2.0HIGH 9.3
  • TI-2009-03144 filter/ww8/ww8par2.cxx in OpenOffice.org (OOo) before 3.2 allows remote attackers to… CVSS 2.0HIGH 9.3
See all 71 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences