CVE intelligence and bounded remediation
CVE-2018-19949 — QNAP NAS File Station Command Injection Vulnerability
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.
- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Published
- 2020-10-28
- CISA KEV
- Known exploited
- Ecosystem
- operating-system
- Weaknesses
- CWE-20, CWE-77, CWE-78
Affected products
- qnap / qts
- qnap / qts / 4.2.6
Showing 2 representative product identities from 12 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.
Matched remediation archetype
Command, code, expression, and template injection
This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.
Check exposure
- Trace untrusted values to process execution, interpreters, evaluators, template engines, dynamic imports, and administrative scripting features.
- Determine whether the affected path is reachable across each trust boundary and which service account or host privilege it inherits.
- Review configuration for optional execution features, unsafe compatibility modes, and shell invocation.
Remediate safely
- Replace string-built commands or evaluated code with fixed operations and structured argument APIs that do not invoke a shell.
- Use strict allowlists for operation identifiers and reject unexpected input before it reaches any interpreter.
- Update the affected component and add inert regression tests covering metacharacters, encoding variants, and alternate request paths.
Authoritative sources
Complete CVE record and remediation plan
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