CVE-2020-5847: Unraid Remote Code Execution Vulnerability

Reference page built from the source records below, each shown as its source publishes it. Dataset version ref-1799fbcdf284, updated 2026-11-02T23:39:54.475Z.

CISA Known Exploited Vulnerabilities

Name: Unraid Remote Code Execution Vulnerability
Vendor: Unraid
Product: Unraid
Added to the catalog: 2021-11-03
Due date for US federal agencies: 2022-05-03
Catalog version: 2026.10.30

Unraid contains a vulnerability due to the insecure use of the extract PHP function that can be abused to execute remote code as root. This CVE is chainable with CVE-2020-5849 for initial access.

Required action (CISA)

Apply updates per vendor instructions.

Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.

Links in CISA's notes

https://nvd.nist.gov/vuln/detail/CVE-2020-5847

Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

NVD analysis

Status: Analyzed
Published: 2020-03-16T18:15:12.713
Last modified: 2026-06-17T03:22:19.723
Weaknesses: NVD-CWE-Other

Unraid through 6.8.0 allows Remote Code Execution.

Metric	Score	Severity	Vector	Scored by
CVSS 3.1	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	[email protected] (Primary)
CVSS 3.1	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
CVSS 2.0	10	HIGH	AV:N/AC:L/Au:N/C:C/I:C/A:C	[email protected] (Primary)

References

http://packetstormsecurity.com/files/157275/Unraid-6.8.0-Authentication-Bypass-Arbitrary-Code-Execution.html (Exploit, Third Party Advisory, VDB Entry)
https://forums.unraid.net/forum/7-announcements/ (Release Notes, Vendor Advisory)
https://sysdream.com/news/lab/ (Third Party Advisory)
https://sysdream.com/news/lab/2020-02-06-cve-2020-5847-cve-2020-5849-unraid-6-8-0-unauthenticated-remote-code-execution-as-root/ (Broken Link, Exploit, Third Party Advisory)
http://packetstormsecurity.com/files/157275/Unraid-6.8.0-Authentication-Bypass-Arbitrary-Code-Execution.html (Exploit, Third Party Advisory, VDB Entry)
https://forums.unraid.net/forum/7-announcements/ (Release Notes, Vendor Advisory)
https://sysdream.com/news/lab/ (Third Party Advisory)
https://sysdream.com/news/lab/2020-02-06-cve-2020-5847-cve-2020-5849-unraid-6-8-0-unauthenticated-remote-code-execution-as-root/ (Broken Link, Exploit, Third Party Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-5847 (US Government Resource)

This product uses the NVD API but is not endorsed or certified by the NVD.

Read on 2026-11-02T23:41:43.468Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2020-5847

CVE record

Assigner: mitre
State: PUBLISHED
Published: 2020-03-16T17:23:24.000Z
Updated: 2025-10-21T23:35:48.475Z
Problem types: n/a

Unraid through 6.8.0 allows Remote Code Execution.

References

https://sysdream.com/news/lab/
https://forums.unraid.net/forum/7-announcements/
https://sysdream.com/news/lab/2020-02-06-cve-2020-5847-cve-2020-5849-unraid-6-8-0-unauthenticated-remote-code-execution-as-root/
http://packetstormsecurity.com/files/157275/Unraid-6.8.0-Authentication-Bypass-Arbitrary-Code-Execution.html

Read on 2026-11-03T01:04:48.483Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2020/5xxx/CVE-2020-5847.json

Sources and licences

CISA
Source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30, CC0 1.0. Use of this data does not imply endorsement by CISA or DHS.
CC0 1.0 Universal
National Vulnerability Database (NIST)
This product uses the NVD API but is not endorsed or certified by the NVD.
NVD API Terms of Use (NIST publications in the public domain, 17 U.S.C. 105)
CVE Program, The MITRE Corporation
Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation. CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.
CVE Program Terms of Use ("CVE Usage" licence)

Cite this page

Dragons Eye Ransomware Tracker, "CVE-2020-5847: Unraid Remote Code Execution Vulnerability",
entity page, dataset version ref-1799fbcdf284, updated 2026-11-02T23:39:54.475Z,
https://ransomware-tracker.com/cve/CVE-2020-5847 (accessed 2026-11-03).
Underlying source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30.
Underlying source: National Vulnerability Database (NIST), CVE API 2.0, record last modified 2026-06-17T03:22:19.723.
Underlying source: CVE List (CVE Program, The MITRE Corporation), record updated 2025-10-21T23:35:48.475Z.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.

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