CVE-2026-28286: high-severity vulnerability in IceWhaleTech ZimaOS
ZimaOS: Unauthorized Creation of Files/Folders in Restricted System Directories via API
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.6epss 0.5%
ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI. In version 1.5.2-beta3, the application enforces restrictions in the frontend/UI to prevent users from creating files or folders in internal OS paths. However, when interacting directly with the API, the restrictions are bypass-able. By sending a crafted request targeting paths like /etc, /usr, or other sensitive system directories, the API successfully creates files or directories in locations where normal users should have no write access. This indicates that the API does not properly validate the target path, allowing unauthorized operations on critical system directories. No known patch is publicly available.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
IceWhaleTech · ZimaOSRelated CVEs — IceWhaleTech ZimaOS
In the same product, most dangerous first.
CVE-2024-49357HIGHZimaOS (Installed Applications and System Information) has Unauthorized Sensitive Data LeakEPSS 23.7%CVE-2026-21891CRITICALZimaOS has Authentication Bypass via System-Level UsernameEPSS 2.3%CVE-2024-49359HIGHZimaOS vulnerable to Directory Listing via Parameter ManipulationEPSS 1.0%CVE-2024-48931HIGHZimaOS Arbitrary File Read via Parameter ManipulationEPSS 0.7%CVE-2024-48932MEDIUMZimaOS Unauthenticated API Discloses UsernamesEPSS 0.5%CVE-2024-49358MEDIUMZimaOS vulnerable to Username Enumeration via API ResponsesEPSS 0.5%