CVE-2020-2501: QNAP Surveillance Station

Critical severity, CVSS 9.8. EPSS: 2.9% chance of exploitation in the next 30 days.

A stack-based buffer overflow vulnerability has been reported to affect QNAP NAS devices running Surveillance Station. If exploited, this vulnerability allows attackers to execute arbitrary code. QNAP have already fixed this vulnerability in the following versions: Surveillance Station 5.1.5.4.3 (and later) for ARM CPU NAS (64bit OS) and x86 CPU NAS (64bit OS) Surveillance Station 5.1.5.3.3 (and later) for ARM CPU NAS (32bit OS) and x86 CPU NAS (32bit OS)

Affected products

• QNAP Surveillance Station: before 5.1.5.3.3 (fixed in 5.1.5.3.3); from 5.1.5.4.0, before 5.1.5.4.3 (fixed in 5.1.5.4.3)

Published 2021-02-17. Last modified 2026-06-17.