【Vulnerability Alert】QNAP Operating System Contains a High-Risk Security Vulnerability (CVE-2025-66277); Please Confirm and Perform Remediation as Soon as Possible

publish date : 2026-03-27 update date : 2026-03-27

Source: Ministry of education information & communication security contingency platform

"" "" ""


Publication Number	TACERT-ANA-2026032703035454	Publication Time	2026/03/27 15:18
Incident Type	ANA-Vulnerability Alert	Discovery Time	2026/03/27 15:18
Impact Level	Medium
[Subject] 【Vulnerability Alert】QNAP Operating System Contains a High-Risk Security Vulnerability (CVE-2025-66277); Please Confirm and Perform Remediation as Soon as Possible
[Content] Forwarded from the National Institute of Cyber Security NISAC-200-202603-00000014 Researchers have identified a link following vulnerability (CVE-2025-66277) in the QNAP operating system. An unauthenticated remote attacker can exploit this vulnerability to access unauthorized file system paths. Please confirm and perform remediation as soon as possible. (Information Sharing Level: WHITE (Information content can be publicly disclosed)
[Affected Platform] QTS versions 5.2.x to versions earlier than 5.2.8.3350 build 20251216 QuTS hero versions h5.2.x to versions earlier than h5.2.8.3350 build 20251216
[Recommended Actions] The official vendor has released a security update to address this vulnerability. Please refer to the official instructions and perform the update at the following URL: https://www.qnap.com/en/security-advisory/qsa-26-05
[Reference] https://nvd.nist.gov/vuln/detail/CVE-2025-66277

(This notification is for informational purposes only and does not constitute a cybersecurity incident).
If you have questions or suggestions regarding this notification, please feel free to contact us.
Ministry of education information & communication security contingency platform
Website: https://info.cert.tanet.edu.tw/
Phone: +886-7-5250211
Internet Phone: 98400000
E-Mail: service@cert.tanet.edu.tw

Organizer: Computer Center

Click Num:

Share