CVE-2023-23363: QNAP QTS

Critical severity, CVSS 9.8. EPSS: 0.9% chance of exploitation in the next 30 days.

A buffer copy without checking size of input vulnerability has been reported to affect QNAP operating system. If exploited, the vulnerability possibly allows remote users to execute code via unspecified vectors. We have already fixed the vulnerability in the following versions: QTS 4.3.6.2441 build 20230621 and later QTS 4.3.3.2420 build 20230621 and later QTS 4.2.6 build 20230621 and later QTS 4.3.4.2451 build 20230621 and later

Affected products

• QNAP QTS: from 4.3.3, before 4.3.3.2420 (fixed in 4.3.3.2420); from 4.3.4, before 4.3.4.245 (fixed in 4.3.4.245); from 4.3.6, before 4.3.6.2441 (fixed in 4.3.6.2441)

Published 2023-09-22. Last modified 2026-06-17.