CVE-2026-44257: Efwgrp EFW4.X

Critical severity, CVSS 9.3. EPSS: 0.5% chance of exploitation in the next 30 days.

efw4.X is an Enterprise Framework for Web. Prior to 4.08.010, efw.file.FileManager.unZip writes zip entries to disk using new File(baseDir, zipEntry.getName()) with no canonical-path check. An entry name such as ../../../pwned.jsp escapes the intended extraction directory and lands anywhere the Tomcat process can write — including the servlet context root. Combined with the framework's multipart /uploadServlet and an event that calls file.saveUploadFiles + FileManager.unZip, a remote attacker with no credentials drops a JSP webshell and executes arbitrary commands as the Tomcat user. This vulnerability is fixed in 4.08.010.

Affected products

• Efwgrp EFW4.X: before 4.08.010 (fixed in 4.08.010)

Published 2026-05-12. Last modified 2026-06-17.