CVE-2017-12110: Libxls Project Libxls

High severity, CVSS 7.8. EPSS: 2.2% chance of exploitation in the next 30 days.

An exploitable integer overflow vulnerability exists in the xls_appendSST function of libxls 1.4.A specially crafted XLS file can cause memory corruption resulting in remote code execution.

Affected products

• Libxls Project Libxls: version 1.4 only

Published 2017-11-20. Last modified 2026-06-17.