(Pwn2Own) QNAP TS-464 reset_password.cgi Improper Certificate Validation Authentication Bypass Vulnerability

July 31st, 2025
ZDI-25-744 ZDI-CAN-25483

CVE ID

CVSS Score

7.5 AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

QNAP

Affected Products

TS-464

Vulnerability Details

This vulnerability allows network-adjacent 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 reset_password.cgi endpoint. The issue results from the lack of proper validation of the certificate presented by a server. 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

@quangnh89 and @ExLuck99

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