CVE-2020-2501

9.8 criticalEPSS 2.9%

Critical (9.8) in qnap surveillance station. 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)

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 2.9% chance of exploitation in the next 30 days; higher than 87% of CVEs (scores of 2026-10-31)
CWEs: CWE-787, CWE-121
Published: 2021-02-17
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

qnap:surveillance_station

References

https://www.qnap.com/en/security-advisory/qsa-21-07
https://www.qnap.com/en/security-advisory/qsa-21-07

Check your stack JSON