CVE-2012-3456: Calligra

High severity, CVSS 7.5. EPSS: 20.1% chance of exploitation in the next 30 days.

Heap-based buffer overflow in the read function in filters/words/msword-odf/wv2/src/styles.cpp in the Microsoft import filter in Calligra 2.4.3 and earlier allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a crafted ODF style in an ODF document. NOTE: this is the same vulnerability as CVE-2012-3455, but it was SPLIT by the CNA even though Calligra and KOffice share the same codebase.

Affected products

• Calligra Calligra: up to and including 2.4.3; version 2.4 only; version 2.4.1 only; version 2.4.2 only

Published 2012-08-20. Last modified 2026-06-16.