CVE-2020-28587: Softmaker Planmaker 2021

High severity, CVSS 7.8. EPSS: 0.9% chance of exploitation in the next 30 days.

A specially crafted document can cause the document parser to copy data from a particular record type into a static-sized buffer within an object that is smaller than the size used for the copy, which will cause a heap-based buffer overflow. An attacker can entice the victim to open a document to trigger this vulnerability. This affects SoftMaker Software GmbH SoftMaker Office PlanMaker 2021 (Revision 1014).

Affected products

• Softmaker Planmaker 2021: version 1014 only

Published 2021-02-23. Last modified 2026-06-17.