CVE-2018-6641: Wiris Mathtype

Critical severity, CVSS 9.8. EPSS: 5.6% chance of exploitation in the next 30 days.

An Arbitrary Free (Remote Code Execution) issue was discovered in Design Science MathType 6.9c. Crafted input can overwrite a structure, leading to a function call with an invalid parameter, and a subsequent free of important data such as a function pointer or list pointer. This is fixed in 6.9d.

Affected products

• Wiris Mathtype: version 6.9c only

Published 2018-02-28. Last modified 2026-06-17.