(Pwn2Own) QNAP TS-453E smbd domain_name Argument Injection Authentication Bypass Vulnerability
Vulnerability Details
This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of QNAP TS-453E devices. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the handling of of the domain_name parameter. The issue results from the lack of proper validation of a user-supplied string before using it to prepare an argument for a system call. 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/security-advisory/qsa-25-45
Disclosure Timeline
- 2025-11-18 - Vulnerability reported to vendor
- 2026-03-17 - Coordinated public release of advisory
- 2026-03-17 - Advisory Updated
Credit
YingMuo (@YingMuo) of DEVCORE Research Team, HexRabbit (@h3xr4bb1t) of DEVCORE Research Team, LJP (@ljp_tw) of DEVCORE Research Team, nella17 (@nella17tw), working with DEVCORE Internship Program
