Medium severity6.5NVD Advisory· Published Oct 7, 2021· Updated Jun 17, 2026
CVE-2021-40439
CVE-2021-40439
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3cpe:2.3:a:apache:openoffice:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:apache:openoffice:*:*:*:*:*:*:*:*range: <=4.1.10
- (no CPE)range: <=4.1.10
- (no CPE)range: Apache OpenOffice
Patches
Vulnerability mechanics
References
3- www.openwall.com/lists/oss-security/2021/10/07/4nvdMailing ListThird Party Advisory
- lists.apache.org/thread.html/rfb2c193360436e230b85547e85a41bea0916916f96c501f5b6fc4702%40%3Cusers.openoffice.apache.org%3EnvdMailing ListVendor Advisory
- lists.apache.org/thread.html/r41eca5f4f09e74436cbb05dec450fc2bef37b5d3e966aa7cc5fada6d%40%3Cannounce.apache.org%3Envd
News mentions
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