Malware Remover
CVE-2025-11837
CRITICAL
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Code injection prevention, sandbox exec
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS 9.8 (Critical). Network vector, no auth, low complexity. A vulnerability in a security tool is particularly dangerous because it undermines the defense users are relying on. EPSS 0.15%. |
| Exploit ScenarioDerived | An attacker targets a QNAP NAS and exploits the Malware Remover vulnerability to bypass malware scanning and execute arbitrary code. They deploy ransomware or exfiltrate NAS data while the security tool is neutralized. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAIv1 – Mar 12, 2026
QNAP Malware Remover before 6.6.8.20251023 has a code generation vulnerability that allows remote attackers to bypass the protection mechanism. An ironic vulnerability in a security tool that is supposed to protect QNAP NAS devices.
Earlier versions of this analysis (1)
QNAP Malware Remover allows remote code generation bypass, undermining the security tool's protection mechanism on NAS devices.
RemediationAI
Update to Malware Remover 6.6.8.20251023 or later via QNAP App Center. Restrict NAS access from the internet. Enable QNAP Security Counselor for additional monitoring.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
The malware removal tool itself contains a code injection flaw (CWE-94) that allows remote attackers to bypass its protection mechanism. This effectively turns a defensive tool into an attack vector. NAS devices are high-value targets containing user data and often running 24/7 with network exposure.
Know when Malware Remover gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
An improper control of generation of code vulnerability has been reported to affect Malware Remover. The remote attackers can then exploit the vulnerability to bypass protection mechanism.
We have already fixed the vulnerability in the following version: Malware Remover 6.6.8.20251023 and later
Zero Day Initiative Advisories
Executive ViewAI
Organizations using An improper control of generation of code vulnerability face critical risk from CVE-2025-11837, a code injection vulnerability rated CVSS 9.8. Successful exploitation could allow attackers to execute arbitrary code or commands on affected systems, potentially leading to full system compromise. Organizations should apply vendor updates immediately when available and implement compensating controls in the interim.
Apply vendor patch. If immediate patching is not feasible: (1) Deploy WAF rules to block injection patterns; (2) Restrict network access to affected components; (3) Enable enhanced logging for suspicious activity.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Code injection occurs when an application accepts user input and passes it directly into a language interpreter or evaluator without proper sanitization.
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
GitHub PoC
Exploit-DB