CVE-2026-28442: ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI

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HIGH 8.5MITIGATE

CVE-2026-28442 is a high-severity flaw (CVSS 8.5) affecting zimaos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI. In version 1.5.2-beta3, users are restricted from deleting internal system files or folders through the application interface. However, when interacting directly with the API, these restrictions can be bypassed. By altering the path parameter in the delete request, internal OS files and directories can be removed successfully. The backend processes thes

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-73
Published	2026-03-05
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: zimaspace

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-05 21:16 UTCPublished CVE record published
2026-06-17 10:28 UTCUpdated Record last modified

zimaspace zimaos MITIGATE

Affected: 1.5.2 beta3

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.5.2

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-28442?

zimaos: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-28442 being exploited?

CVE-2026-28442 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-28442 affect?

CVE-2026-28442 affects zimaos. Severity is high (CVSS 8.5). ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI. In version 1.5.2-beta3, users are restricted from deleting internal system files or folders through the application interface. However, when inte

How urgent is CVE-2026-28442?

Priority 41/100. High severity; Public exploit reference

Related CVEs

CVE-2026-28798 CRITICAL 9.0 UPGRADE ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI
CVE-2026-28286 HIGH 8.5 MITIGATE ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI
CVE-2025-64427 HIGH 7.1 UPGRADE ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI

References

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