Vulnerability Database

393,392

Total vulnerabilities in the database

CVE-2019-7183 — qnap / qts

Improper Link Resolution Before File Access ('Link Following')

This improper link resolution vulnerability allows remote attackers to access system files. To fix this vulnerability, QNAP recommend updating QTS to their latest versions.

  • Published: Dec 5, 2019
  • Updated: Oct 3, 2026
  • CVE: CVE-2019-7183
  • Severity: Critical
  • Exploit:
  • CISA KEV:

CVSS v3:

  • Severity: Critical
  • Score: 9.8
  • AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/Au:N/C:P/I:P/A:P

CWEs:

Software Affected versions
qnap / qts = 4.2.6
qnap / qts = 4.3.3.0868
qnap / qts = 4.3.3.0998
qnap / qts = 4.3.4.0899
qnap / qts = 4.3.4.1029
qnap / qts = 4.3.6.0895
qnap / qts = 4.3.6.0907
qnap / qts = 4.3.6.0923
qnap / qts = 4.3.6.0944
qnap / qts = 4.3.6.0959
qnap / qts = 4.3.6.0979
qnap / qts = 4.3.6.0993
qnap / qts = 4.3.6.1013
qnap / qts = 4.3.6.1033
qnap / qts = 4.4.1.0948-beta
qnap / qts = 4.4.1.0949-beta
qnap / qts = 4.4.1.0978-beta_2
qnap / qts = 4.4.1.0998-beta_3
qnap / qts = 4.4.1.0999-beta_3
qnap / qts = 4.4.1.1031-beta_4
qnap / qts = 4.4.1.1033-beta_4
qnap / qts = 4.4.1.1064
qnap / qts = 4.4.1.1081
qnap / qts = 4.4.1.1086
qnap / qts = 4.4.1.1101

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.