vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2021-40439

Billion Laughs

MEDIUM
6.5
CVSS Score
Published: October 7, 2021 at 03:50 PM UTC
Updated: June 17, 2026 at 04:06 AM UTC
1 product affected across 1 vendorOpenoffice

Using Apache OpenOffice by Apache Software Foundation?

Get instant alerts when new vulnerabilities affect Apache OpenOffice - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM6.5
Exploit prediction
EPSS 4%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Openoffice· Apache
95%
v ≤ 4.1.10Apache OpenOffice ≤ v ≤ 4.1.10OpenOffice.org ≤ v ≤ 3.4OpenOffice.org

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2021/10/07/4
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r41eca5f4f09e74436cbb05dec450fc2bef37b5d3e966aa7cc5fada6d%40%3Cannounce.apache.org%3E
x_refsource_MISCMailing Listx_refsource_MLISTVendor Advisory
Source: [email protected]
https://lists.apache.org/thread.html/rfb2c193360436e230b85547e85a41bea0916916f96c501f5b6fc4702%40%3Cusers.openoffice.apache.org%3E

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-611

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card