ZDI-CAN-28435: ZDI-26-199: (Pwn2Own) QNAP TS-453E conn_log_tool Format String Remote Code Execution Vulnerability

Published Mar 16, 2026

Updated

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of QNAP TS-453E devices. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The ZDI has assigned a CVSS rating of 5.5. The following CVEs are assigned: CVE-2025-62848.

Affected Software

1 affected component

QNAP TS-453E

Event History

Mar 16, 2026

Advisory Published

via ZDI·05:00 AM

Data Sourced

via ZDI·05:00 AM

Description

Frequently Asked Questions

What is the severity of ZDI-CAN-28435?

The severity of ZDI-CAN-28435 is critical due to the potential for remote code execution on affected devices.

How do I fix ZDI-CAN-28435?

To fix ZDI-CAN-28435, update your QNAP TS-453E device to the latest firmware provided by the vendor.

Who is affected by ZDI-CAN-28435?

Users of the QNAP TS-453E devices are affected by ZDI-CAN-28435.

Can ZDI-CAN-28435 be exploited remotely?

While ZDI-CAN-28435 requires network adjacency, it can allow authenticated attackers to execute arbitrary code remotely.

Is authentication required to exploit ZDI-CAN-28435?

Yes, authentication is required to exploit the ZDI-CAN-28435 vulnerability on affected devices.