CVE-2021-34362Network attack vector

Authenticated arbitrary command execution

Published Oct 22, 2021 · Updated Sep 16, 2024

Command injection in QNAP Media Streaming Add-on before 430.1.8.12 or 500.0.0.3 allows remote authenticated users to run arbitrary commands. QNAP has not published the affected request, parameter, or command-construction operation that fails to neutralize untrusted input. Exploitation requires high-privilege authenticated access to the NAS management surface and permits commands to read or alter stored data or interrupt services.

CVSS severity8.7
High
EPSS probability1.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in QNAP Media Streaming Add-on before 430.1.8.12 or 500.0.0.3 allows remote authenticated users to run arbitrary commands. QNAP has not published the affected request, parameter, or command-construction operation that fails to neutralize untrusted input. Exploitation requires high-privilege authenticated access to the NAS management surface and permits commands to read or alter stored data or interrupt services.

The record

CVE
CVE-2021-34362
Published
Oct 22, 2021
Updated
Sep 16, 2024
Vendor
Linn Products Limited
Product
Media Streaming Add-on
Classifications
CWE-77, CWE-78, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 22, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=unspecified <430.1.8.12 ( 2021/08/20 )
  2. Affected versionversion=unspecified <430.1.8.12 ( 2021/09/29 )
  3. Affected versionversion=unspecified <500.0.0.3 ( 2021/08/20 )

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Linn Products Limited · Media Streaming Add-onversion=unspecified <430.1.8.12 ( 2021/08/20 ); version=unspecified <430.1.8.12 ( 2021/09/29 ); version=unspecified <500.0.0.3 ( 2021/08/20 )

Published CVSS scores

8.7QNAP Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
7.2NIST NVDCVSS: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 exploitationUnconfirmed
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.

Technologies

Your stack

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Your stack

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