CVE-2026-22901Network attack vector

Authenticated command execution via undisclosed injection

Published Mar 20, 2026 · Updated Mar 20, 2026

OS command injection in QNAP QuNetSwitch 2.0.x before 2.0.5.0906 allows remote authenticated users to execute arbitrary commands. QNAP has not disclosed the affected request, parameter, function, or operation that passes attacker-controlled input to an operating-system command. A valid user account and network access to the management interface are required; exploitation executes commands with the QuNetSwitch service's privileges.

CVSS severity9.8
Critical
EPSS probability0.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in QNAP QuNetSwitch 2.0.x before 2.0.5.0906 allows remote authenticated users to execute arbitrary commands. QNAP has not disclosed the affected request, parameter, function, or operation that passes attacker-controlled input to an operating-system command. A valid user account and network access to the management interface are required; exploitation executes commands with the QuNetSwitch service's privileges.

The record

CVE
CVE-2026-22901
Published
Mar 20, 2026
Updated
Mar 20, 2026
Vendor
Linn Products Limited
Product
QuNetSwitch
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 2026Record 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=2.0.x <2.0.5.0906

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Linn Products Limited · QuNetSwitchversion=2.0.x <2.0.5.0906

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.3QNAP Systems, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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