CVE-2018-19949
critical CISA KEVQNAP NAS File Station Command Injection Vulnerability
Vendor / product: QNAP — Network Attached Storage (NAS)
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.
CVSS
9.8
9.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2020-10-28 18:15
Modified: 2026-10-02 04:17
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-27 07:07 UTC
Exploitation
Listed in CISA KEV
Added 2022-05-24 · due 2022-06-14
Known ransomware use: Known
Required action (CISA)
Apply updates per vendor instructions.
Affected products
qnap / qts <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
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://www.qnap.com/zh-tw/security-advisory/qsa-20-01
Vendor advisory: https://www.qnap.com/zh-tw/security-advisory/qsa-20-01
References
- https://www.qnap.com/zh-tw/security-advisory/qsa-20-01 security@qnapsecurity.com.tw
- https://www.qnap.com/zh-tw/security-advisory/qsa-20-01 af854a3a-2127-422b-91ae-364da2661108
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-19949 134c704f-9b21-4f2e-91b3-4a467353bcc0
Data sources
CISA KEV — fetched 2026-10-27 06:50 UTC · record ↗
NVD CVE API 2.0 — fetched 2026-10-27 07:07 UTC · record ↗