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QTS 4.2.6 build 20210327

Posted: Fri Apr 09, 2021 6:38 pm
by erinkuo
Download links:


QTS 4.2.6 build 20210327

- QNAP only provides limited support (mainly security updates) for the following models: SS-439 Pro, SS-839 Pro, TS-110, TS-210, TS-239 Pro, TS-239 Pro II, TS-239 Pro II+, TS-239H, TS-259 Pro, TS-259 Pro+, TS-269H, TS-410, TS-410U, TS-439 Pro, TS-439 Pro II, TS-439 Pro II+, TS-439U-RP/ SP, TS-459 Pro, TS-459 Pro II, TS-459 Pro+, TS-459U-RP/SP, TS-459U-RP+/SP+, TS-509 Pro, TS-559 Pro, TS-559 Pro II, TS-559 Pro+, TS-639 Pro, TS-659 Pro, TS-659 Pro II, TS-659 Pro+, TS-809 Pro, TS-809U-RP, TS-859 Pro, TS-859 Pro+, TS-859U-RP, TS-859U-RP+.

[Important Notes]
- For the status of QTS updates and maintenance for your NAS model, visit

[Security Updates]
- Fixed a command injection vulnerability (CVE-2020-2509).
- When users updated QTS to 4.2.6, QTS would automatically install Photo Station 5.2.7 even if users had already installed a later version of Photo Station.