CVE-2019-7193: QNAP QTS improper input validation allows remote code injection

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 17 September 2026. Confidence: high.

critical priorityCVSS 9.8 with no authentication or interaction required, active KEV listing, documented ransomware use, and public exploit code make this an urgent patch target.

What it is

QNAP QTS contains an improper input validation flaw that lets remote attackers inject arbitrary code into the system. It is remotely reachable without authentication and has been exploited in ransomware campaigns, so unpatched NAS devices are at serious risk.

Impact

An attacker can execute arbitrary code on the affected QTS system, gaining full control of the NAS and any data or services it hosts.

Attack surface

The vulnerability is network-reachable (AV:N) with no privileges or user interaction required (PR:N, UI:N), so any exposed QTS interface is a potential entry point.

Exploitation

CVE-2019-7193 is listed in CISA KEV with known ransomware campaign use, and public exploit code exists per Packet Storm references; EPSS 30-day probability is about 14.4 percent (96th percentile).

What to do

• Update QTS to the latest vendor-recommended version per the QNAP security advisory NAS-201911-25.
• Remove or restrict internet exposure of QTS management interfaces; place NAS administration behind VPN or trusted networks.
• Apply network segmentation and firewall rules so NAS devices cannot be reached directly from untrusted networks.
• Monitor for and block known exploitation and ransomware indicators targeting QNAP devices.
• Verify patching status across all QNAP NAS assets, including any that were offline during prior update cycles.

Detection

• Review QTS and web server logs for unusual POST requests or command-injection patterns against management endpoints.
• Alert on unexpected child processes spawned by QTS web services (for example shell or scripting interpreters).
• Monitor for new or modified files in QTS web directories and unexpected outbound connections from NAS devices.
• Correlate NAS host telemetry with ransomware indicators and known QNAP exploitation activity.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.