CVE-2020-27819: Libxls Project Libxls

Medium severity, CVSS 5.5. EPSS: 0.8% chance of exploitation in the next 30 days.

An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted XLS file.

Affected products

• Libxls Project Libxls: before 1.6.2 (fixed in 1.6.2)

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