CVE-2020-13544: Softmaker Office

High severity, CVSS 7.8. EPSS: 1.6% chance of exploitation in the next 30 days.

An exploitable sign extension vulnerability exists in the TextMaker document parsing functionality of SoftMaker Office 2021’s TextMaker application. A specially crafted document can cause the document parser to sign-extend a length used to terminate a loop, which can later result in the loop’s index being used to write outside the bounds of a heap buffer during the reading of file data. An attacker can entice the victim to open a document to trigger this vulnerability.

Affected products

• Softmaker Softmaker Office: version 2021 only

Published 2021-01-06. Last modified 2026-06-17.