Quick answers
- Is CVE-2026-44257 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-44257 being exploited in the wild.
- How severe is CVE-2026-44257?
- Informational severity, with a CVSS score of 9.3, published 12 May 2026.
- Which products and versions are affected?
- Eurotherm efw4.X < 4.08.010.
- Is there a fix for CVE-2026-44257?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-44257 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-44257?
- Check whether you run Eurotherm efw4.X at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A Zip Slip vulnerability exists in efw.file.FileManager.unZip due to the lack of a canonical path check when processing zip entries. By crafting a ZIP file with entry names containing path traversal sequences (e.g., ../../../), an attacker can write files outside of the intended extraction directory. When combined with the framework's /uploadServlet and file.saveUploadFiles functionality, an unauthenticated remote attacker can drop a JSP webshell into the servlet context root. This results in remote code execution (RCE) with the privileges of the Tomcat process. The issue is resolved in version 4.08.010.
Affected products
- efwGrp efw4.X < 4.08.010
Timeline
- 2026-04-28: advisory: GitHub Security Advisory published
- 2026-05-12: disclosed: CVE published to NVD