Vulnerability record

CVE-2018-19949

QNAP NAS File Station Command Injection Vulnerability

CriticalExploitation confirmedCISA KEV Used by ransomware

What should I do?

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Network Attached Storage (NAS), fix it now.

CISA required action: Apply updates per vendor instructions.

US federal civilian agencies must remediate by Jun 14, 2022.

Patch status

No official fix confirmed yet

Until a fix ships, follow the vendor's mitigations and CISA's required action, limit exposure of affected systems, and watch this record for a patch.

Description

If exploited, this command injection vulnerability could allow remote attackers to run arbitrary commands. QNAP has already fixed the issue in the following QTS versions. QTS 4.4.2.1231 on build 20200302; QTS 4.4.1.1201 on build 20200130; QTS 4.3.6.1218 on build 20200214; QTS 4.3.4.1190 on build 20200107; QTS 4.3.3.1161 on build 20200109; QTS 4.2.6 on build 20200109.

Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.

Affected products

Products affected by this vulnerability, with versions and the source of each entry
Product	Vendor	Affected versions	Fixed in	Source
Network Attached Storage (NAS)	QNAP	—	—	KEV
QTS	QNAP	< 4.2.6; >= 4.3.1.0013, < 4.3.3.1161; >= 4.3.4, < 4.3.4.1190; >= 4.3.6, < 4.3.6.1218; >= 4.4.0, < 4.4.1.1201; >= 4.4.2, < 4.4.2.1231	4.2.6; 4.3.3.1161; 4.3.4.1190; 4.3.6.1218; 4.4.1.1201; 4.4.2.1231	NVD

Sources: KEV = CISA Known Exploited Vulnerabilities catalog; NVD = NIST National Vulnerability Database.

Intelligence timeline

Developments from the last 30 days, newest first.

CVSS scoredUpdateKEVSep 30, 2026
CVE-2018-19949 scored CVSS 9.8: QNAP Network Attached Storage (NAS), QNAP NAS File Station Command Injection Vulnerability
CISA lists this as exploited in the wild and known to be used in ransomware campaigns. Unpatched Network Attached Storage (NAS) systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database

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Coverage

We have not published a story about this vulnerability yet.

References

nvd.nist.gov https://nvd.nist.gov/vuln/detail/CVE-2018-19949
qnap.com https://www.qnap.com/zh-tw/security-advisory/qsa-20-01
cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-19949