CVE-2020-5847VulnerabilityPublished 11/03/2021Updated 10/24/2026

CVE-2020-5847: Unraid Remote Code Execution Vulnerability

Affects Unraid UnraidSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 11/03/2021
KEV deadline: 05/03/2022
EPSS: 95.8% chance of exploitation in 30 days – higher than 99% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2020-5847 (opens in a new tab)

Description

Unraid contains a vulnerability involving insecure use of the PHP extract function, allowing remote code execution with root privileges. This vulnerability (CVE-2020-5847) can be chained with CVE-2020-5849 to gain initial access. It has been exploited in the wild. No specific affected versions or patch information is provided.

Summary

CVE-2020-5847 is a remote code execution vulnerability in Unraid caused by insecure use of the PHP extract function. This flaw allows attackers to execute code with root privileges on the affected system. The vulnerability is known to be exploitable in the wild and can be chained with CVE-2020-5849 for initial access. No vendor advisory or patch information is provided in the input data.

Impact

Successful exploitation results in remote code execution as root, giving attackers full control over the affected Unraid system. This can lead to complete system compromise. The vulnerability has been observed in active exploitation scenarios.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, monitor vendor communications for updates and consider restricting access to Unraid management interfaces to trusted networks.

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 08:43:11 UTC

References

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