If exploited, this command injection vulnerability could allow remote attackers to run arbitrary commands.

published 2020-10-28 6 y ago modified 2026-10-02 38 d ago also EUVD-2018-11620

cvss: 9.8; version 3.1, CNA
cisa kev: Exploited; added 2022-05-24, used in ransomware
epss: 30.2%; EPSS 30.2% chance of exploitation in 30 days, percentile 98%
public exploits: 0; none known

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.

Patch / fix

cisa required action Apply updates per vendor instructions.

fixed in 1

QNAP Systems Inc. QTS 4.2.6, 4.3.3.1161, 4.3.4.1190, 4.3.6.1218, 4.4.1.1201, 4.4.2.1231

Timeline

2020-10-28 Published
2022-05-24 Added to CISA KEV
2022-06-01 CISA SSVC: exploitation active
2022-06-14 CISA patch deadline

Known exploited

Added: 4 y ago (2022-05-24)
Patch by: 2022-06-14 (4 y ago)
Ransomware: Known to be used in ransomware campaigns
Required action: Apply updates per vendor instructions.
Vendor, product: QNAP, Network Attached Storage (NAS)
CISA name: QNAP NAS File Station Command Injection Vulnerability

CISA SSVC

Exploitation: Active, exploited in the wild
Automatable: yes
Technical impact: total
Assessed: 4 y ago (2022-06-01)

Exploit prediction

30.16% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

QNAP Systems Inc. QTS

Classification

Weakness

CWE-20 Improper Input Validation
CWE-77 Improper Neutralization of Special Elements used in a Command
CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

qnap.com /zh-tw/security-advisory/qsa-20-01
vendor-advisory
cisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-19949
government-resource, us-government-resource

Sources

CVE List CVE-2018-19949
NVD CVE-2018-19949

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary