CVE-2022-39843: Lotus 1-2-3 Project Lotus 1-2-3

High severity, CVSS 7.8. EPSS: 0.5% chance of exploitation in the next 30 days.

123elf Lotus 1-2-3 before 1.0.0rc3 for Linux, and Lotus 1-2-3 R3 for UNIX and other platforms through 9.8.2, allow attackers to execute arbitrary code via a crafted worksheet. This occurs because of a stack-based buffer overflow in the cell format processing routines, as demonstrated by a certain function call from process_fmt() that can be reached via a w3r_format element in a wk3 document.

Affected products

Published 2022-09-05. Last modified 2026-06-17.