Advisory Details

March 16th, 2026

(Pwn2Own) QNAP TS-453E malware_remover Code Injection Remote Code Execution Vulnerability

ZDI-26-198
ZDI-CAN-28324

CVE ID CVE-2025-11837
CVSS SCORE 8.8, AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS QNAP
AFFECTED PRODUCTS TS-453E
VULNERABILITY DETAILS

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of QNAP TS-453E devices. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the malware_remover.cgi endpoint. The issue results from the lack of proper validation of a user-supplied string before using it to execute Python code. An attacker can leverage this vulnerability 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/security-advisory/qsa-25-47
DISCLOSURE TIMELINE
  • 2025-11-18 - Vulnerability reported to vendor
  • 2026-03-16 - Coordinated public release of advisory
  • 2026-03-16 - Advisory Updated
CREDIT Chumy Tsai (github.com/Jimmy01240397) @ CyCraft Technology Intern
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