CVE-2021-28811Known exploitationNetwork attack vector

Authenticated command execution via undisclosed injection

Published Jun 8, 2021 · Updated Sep 16, 2024

OS command injection in Roon Labs Roon Server before 2021-05-18 allows remote authenticated users to execute arbitrary commands. The CNA record and QNAP advisory do not disclose the affected endpoint, parameter, or unsafe command-construction operation. Exploitation requires high privileges over a network interface and can compromise data and interrupt the server.

CVSS severity7.2
High
EPSS probability1.45%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Roon Labs Roon Server before 2021-05-18 allows remote authenticated users to execute arbitrary commands. The CNA record and QNAP advisory do not disclose the affected endpoint, parameter, or unsafe command-construction operation. Exploitation requires high privileges over a network interface and can compromise data and interrupt the server.

The record

CVE
CVE-2021-28811
Published
Jun 8, 2021
Updated
Sep 16, 2024
Vendor
Roon Labs
Product
Roon Server
Classifications
CWE-77, CWE-78, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 8, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <2021-05-18

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Roon Labs · Roon Serverversion=unspecified <2021-05-18

Published CVSS scores

7.2QNAP Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.5NIST National Vulnerability DatabaseAV:N/AC:L/Au:S/C:P/I:P/A:P
7.2NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

See the directory against your own environment.

Your stack

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