Advisory Details

July 31st, 2025

(Pwn2Own) QNAP TS-464 Improper Handling of URL Encoding Authentication Bypass Vulnerability

CVE ID
CVSS SCORE	9.8, AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	QNAP
AFFECTED PRODUCTS	TS-464
VULNERABILITY DETAILS	This vulnerability allows remote attackers to bypass authentication on affected installations of QNAP TS-464 devices. Authentication is not required to exploit this vulnerability. The specific flaw exists within the function responsible for URL decoding. The issue results from improper implementation of the decoding algorithm. An attacker can leverage this vulnerability to bypass authentication on the system.
ADDITIONAL DETAILS	QNAP has issued an update to correct this vulnerability. More details can be found at: https://www.qnap.com/en-us/security-advisories
DISCLOSURE TIMELINE	2024-12-02 - Vulnerability reported to vendor 2025-07-31 - Coordinated public release of advisory 2025-07-31 - Advisory Updated
CREDIT	Chris Anastasio @mufinnnnnnn & Fabius Watson

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