CVE-2026-28286
HIGHCVSS Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
3Description
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.
Analysis
ZimaOS 1.5.2-beta3 lacks proper path validation in its API, allowing authenticated users to bypass frontend restrictions and write files to protected system directories such as /etc and /usr. Public exploit code exists for this vulnerability, enabling attackers with valid credentials to modify critical OS files and potentially achieve code execution. …
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Remediation
Within 24 hours: Immediately identify and inventory all systems running ZimaOS 1.5.2-beta3; restrict network access to affected devices and disable remote management capabilities. Within 7 days: Evaluate upgrade feasibility to patched versions when available; if unavailable, implement network segmentation to isolate affected systems from production infrastructure. …
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External POC / Exploit Code
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