(Pwn2Own) QNAP TS-464 Improper Handling of URL Encoding Authentication Bypass Vulnerability
July 31st, 2025
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
