CVE-2025-11837Known exploitationNetwork attack vector

Unauthenticated root code execution via unvalidated Python input

Published Jan 2, 2026 · Updated Jan 2, 2026

Code injection in QNAP Malware Remover 6.6.x allows remote attackers to execute arbitrary code as root through a crafted network request. The malware_remover.cgi endpoint passes a user-supplied string into Python execution without validating or neutralizing code syntax. Authentication and user interaction are not required; successful exploitation grants root-level control of the NAS.

CVSS severityUnavailable
Unscored
EPSS probability1.49%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in QNAP Malware Remover 6.6.x allows remote attackers to execute arbitrary code as root through a crafted network request. The malware_remover.cgi endpoint passes a user-supplied string into Python execution without validating or neutralizing code syntax. Authentication and user interaction are not required; successful exploitation grants root-level control of the NAS.

The record

CVE
CVE-2025-11837
Published
Jan 2, 2026
Updated
Jan 2, 2026
Vendor
Linn Products Limited
Product
Malware Remover
Classifications
CWE-94, CAPEC-242, T1059.006
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 2, 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=6.6.x <6.6.8.20251023

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Linn Products Limited · Malware Removerversion=6.6.x <6.6.8.20251023

Published CVSS scores

8.1QNAP Systems Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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
Privilegesunauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CAPEC-242Code Injection
T1059.006Command and Scripting Interpreter: Python

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

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Your stack

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