(Pwn2Own) QNAP QHora-322 gRPC WAN_ADDR6 Command Injection Remote Code Execution Vulnerability

July 31st, 2025
ZDI-25-752 ZDI-CAN-25667

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

QHora-322

Vulnerability Details

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of QNAP QHora-322 routers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of gRPC messages. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root.

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

Daan Keuper, Thijs Alkemade and Khaled Nassar from Computest Sector 7

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